Isomat NG70 Mast

NG2 Masthead Sheave: NG2-3: Factory standard Acetyl Sheave is 85mm (3 3/8") x 15mm (5/8") wide x 22mm (7/8") ID.
NG2 Masthead Sheave - Aluminum: NG2-3A: Anodized Aluminum Sheave is 85mm (3 3/8") x 15mm (5/8") wide x 22mm (7/8") ID, and is much sturdier than the plastic version.
NG2 Masthead Sheave - Aluminum Ball-Bearing: NG2-3ABB: Anodized Aluminum Ball-Bearing Sheave is 85mm (3 3/8") x 15mm (5/8") wide x 22mm (7/8") ID. Unit features Torlon Balls for high load capacity with minimum friction.
*NG2 Short Masthead Sheave Axle: NG2-6S:* Short SS 'Drop-in' Tubular Masthead Sheave Axle is 22mm (7/8") OD x 46mm (1 3/4") long. Hollow Axle fits in Aft side of NG2 Masthead and supports 2 Main Halyard Sheaves (NG2-3 or NG2-3A).
*NG2 Long Masthead Sheave Axle: NG2-6L:* Long SS 'Drop-in' Tubular Masthead Sheave Axle is 22mm (7/8") OD x 81mm (3 1/4") long. Hollow Axle fits in Forward side of NG2 Masthead and supports 4 Jib/Spinnaker Halyard Sheaves (*NG2-3* or *NG2-3A*).
*NG2 Masthead Clevis Pin: NG2-6P:* SS Clevis Pin is used in NG2 Masthead for attachment of topping lift, lazy jacks, or other items. This item is not standard on all masts and your Masthead may not have a hole drilled for this Pin, but, if not drilled, hole position is marked by an indent. Masthead can be easily drilled to add this item if required. Clevis Pin is 8mm (5/16") diameter with a 52mm (2 1/16") grip length. CPM8-52

NG-70 Mast – Jumper Strut Fittings
*NG2 Jumper Strut Fitting, Single: NG2-25S:* SS Bracket for Single (1) 35mm (1 3/8") OD Jumper or Diamond Strut. Welded Bracket has diamond-shaped base that is 122mm (4 3/4") high x 73mm (2 7/8") wide, 38mm OD strut receiver is 78mm (3") long. 555402

NG-70 Mast – Jib Boxes for Fractional Rigs Several other varieties of Jib Boxes and Forestay Attachments are used on the NG-70 Mast Section, See Isomat Jib Boxes and Forestay/Staysail Tangs.
*NG2 Jib Box Ass'y w/ Toggle - 12mm Pin: NG2-30-12A:* *NG2 Jib Box Ass'y w/ Toggle - 14mm Pin: NG2-30-14A:* *NG2 Jib Box Ass'y w/ Toggle - 16mm Pin: NG2-30-16A:* Cast aluminum Jib Box and Forestay Toggle Assembly is designed to be welded in Mast Section. Unit provides a single sheave for an internal Jib or Staysail halyard up to 5/8" diameter and a secure attachment point for Forestays up to 3/8" (10mm) diameter. Assembly uses an 85mm (3 3/8") Acetyl Sheave (NG2-4-16) on a 16mm Axle, (NG2-6B). Toggle mounts on removable 19mm Clevis Pin which can be used to mount optional Spinnaker halyard Spectacle Assembly (NG2-31S), below. Stainless Steel Toggle with Pin (in various pin sizes) is included. Other Pin sizes (1/2" - 5/8") are available, please specify.
	NG2 Jib Box Sheave: NG2-4-16: Acetyl Sheave is 85mm (3 3/8") OD x 20mm (3/4") wide x 16mm (5/8") ID.
	NG2 Jib Box Sheave Axle: NG2-6B: SS 'Drop-in' Sheave Axle pin is 16mm (5/8") diameter x 29.5mm (1 5/32") long.
	*NG2 Jib Box Forestay Toggle, 12mm Pin: NG2-30-12T:* *NG2 Jib Box Forestay Toggle, 14mm Pin: NG2-30-14T:* *NG2 Jib Box Forestay Toggle, 16mm Pin: NG2-30-16T:* Stainless Steel Toggle for use with NG2 Cast Jib Box. Toggle rides on 19mm Pin in casting, lower Clevis pin (in various sizes) is included. Other Pin sizes (1/2" - 5/8") are available, please specify.
	*NG2 Jib Box Toggle Attachment Pin: NG2-30P:* SS Clevis Pin is used in NG2 Cast Jib Box for attachment of Forestay Toggle. Clevis Pin is 19mm (3/4") diameter with a 52mm (2 1/16") grip length. Single Pin is also used for attachment of optional Spinnaker halyard Spectacle Assembly (NG2-31S), below. CPM19-52
	NG2 Jib Box Spinnaker Spectacles: NG2-31S: Optional SS Spectacle Assembly for NG2 Cast Jib Box allows for two (2) Spinnaker halyards and mounts easily on Jib Box Toggle Pin. Cast Stainless 'eyes' are smoothly faired to minimize chafe on halyards up to 1/2" diameter. Spinnaker halyards exit mast through staggered Exit Blocks mounted several feet above Jib Box Assembly and go straight down through Spectacle 'eyes' and forward.

*NG2 Double Jib Box Ass'y w/ Toggle, 8mm Pin: NG2-32-08A:* *NG2 Double Jib Box Ass'y w/ Toggle, 10mm Pin: NG2-32-10A:* *NG2 Double Jib Box Ass'y w/ Toggle, 12mm Pin: NG2-32-12A:* *NG2 Double Jib Box Ass'y w/ Toggle, 14mm Pin: NG2-32-14A:* NG2 Double Jib Box Ass'y w/ Toggle, 16mm Pin: NG2-32-16A: Extruded aluminum Double Jib Box and Forestay Toggle Assembly is designed to be welded in Mast Section. Unit provides two (2) sheaves for internal Jib or Staysail halyards up to 5/8" diameter and a secure attachment point for Forestays up to 3/8" (10mm) diameter. Assembly fits in 4 7/16" high x 1 13/16" wide slot, and uses 85mm (3 3/8") Acetyl Sheaves (NG2-3B10) on a 10mm Axle. Axle slides in through a hole in the side of the Mast, hole is covered with a SS Cover Plate. Toggle mounts on removable 14mm Clevis Pin (CPM14-46). Stainless Steel Toggle with Pin (in various pin sizes) is included. Other Pin sizes (1/2" - 5/8") are available, please specify. B=202304
	Sheave for NG2 Double Jib Box: NG2-3B10: Acetyl Sheave with precision pressed Delrin bushing is 85mm (3 3/8") x 15mm (5/8") wide x 10mm (3/8") ID.
	Sheave Axle for NG2 Double Jib Box: NG2-32SAP: SS Pin is used in NG2 Double Jib Box as Sheave Axle. Straight Pin is 10mm (3/8") diameter x mm (") long.
	*NG2 Double Jib Box Forestay Toggle, 8mm Pin: NG2-32-08T:* *NG2 Double Jib Box Forestay Toggle, 10mm Pin: NG2-32-10T:* *NG2 Double Jib Box Forestay Toggle, 12mm Pin: NG2-32-12T:* *NG2 Double Jib Box Forestay Toggle, 14mm Pin: NG2-32-14T:* *NG2 Double Jib Box Forestay Toggle, 16mm Pin: NG2-32-16T:* Stainless Steel Toggle only, for use with NG2 Double Jib Box. Slotted Toggle rides on 14mm Pin, lower Clevis pin (in various sizes) is included. Other Pin sizes (3/8" - 5/8") are available, please specify. Toggle is 35mm wide with 65mm between pin centers, and will accommodate eyes up to 16mm (5/8") thick. Slot is 7mm wide x 50mm deep.
	*NG2 Double Jib Box Toggle Attachment Pin: NG2-32TP:* SS Clevis Pin is used in NG2 Double Jib Box for attachment of Forestay Toggle. Clevis Pin is 14mm (9/16") diameter with a 52mm (2 1/16") grip length. CPM14-52

NG-70 Mast – Exit Blocks Several varieties of Exit Blocks are used on the NG-70 Mast Section, See Isomat Exit Blocks.

NG-70 Mast – Spreaders The NG-70 Mast Section is commonly used with Several different sizes of Spreaders. Standard Spreader Bases are listed below, for Spreaders, Spreader Parts, and other Spreader Bases, See Isomat Spreaders & Components.

NG-70 Mast – Spreader Bases
Spreader Base for BF3 Spreader - Port: BF3-36P: Spreader Base for BF3 Spreader - Starboard: BF3-36S: Unique spreader base design incorporates (2) sockets for use with stemballs on lower and intermediate shrouds. Cast aluminum bases are welded to the mast and accommodate a variety of spreader angles depending on how the inboard spreader end is cut. BF-3 Spreader is attached with (1) 8mm clevis pin which goes through a plastic bushing to allow for some shock loading. New Bases have hole for 12mm (7/16") OD Spreader Bushing, BF3-31. Base measures 4 1/2" high x (maximum) 4 1/4" long, and projects 3 3/4" out from the Mast. For use with NG-31 through NG-70 Mast Sections. For Spreaders and Spreader Parts, See BF-3 Spreaders & Components.
*Bolt-on Spreader Base for BF3 Spreader - Port: BF3-37P:* *Bolt-on Spreader Base for BF3 Spreader - Starboard: BF3-37S:* Identical to BF3-36, above, but attaches to mast with (4) 6mm (1/4") rivets, and (1) 10mm (3/8") bolt going through the Mast. For Spreaders and Spreader Parts, See BF-3 Spreaders & Components.
*Spreader Base for BF4 Spreader - Port: BF4-35P:* Spreader Base for BF4 Spreader - Starboard: BF4-35S: Unique spreader base design incorporates (2) sockets for use with stemballs on lower and intermediate shrouds. Cast aluminum bases are welded to the mast and accommodate a variety of spreader angles depending on how the inboard spreader end is cut. BF-4 Spreader is attached with (1) clevis pin that goes through a bushing to allow for some shock loading. Bases have hole for 21mm (13/16") OD Spreader Bushing. Base measures 5 1/8" high (maximum) x 4 7/8" long, and projects 5" out from the Mast. For use with NG-46 and larger Mast sections. For Spreaders and Spreader Parts, See BF-4 Spreaders & Components.
*Spreader Base for BF5 Spreader - Port: BF5-35P:* Spreader Base for BF5 Spreader - Starboard: BF5-35S: Unique spreader base design incorporates (2) sockets for use with stemballs on lower and intermediate shrouds. Cast aluminum bases are welded to the mast and accommodate a variety of spreader angles depending on how the inboard spreader end is cut. BF-5 Spreader is attached with (1) 12mm clevis pin that goes through a plastic bushing to allow for some shock loading. New Bases have hole for 21mm (13/16") OD Spreader Bushing, BF5-31. Base measures 5 1/2" high (maximum) x 6 3/8" long, and projects 5 1/4" out from the Mast. For use with NG-70 and larger Mast sections. For Spreaders and Spreader Parts, See BF-5 Spreaders & Components.

NG-70 Mast – Spinnaker Cars Several varieties of Spinnaker Cars are used on the NG-70 Mast Section, See Isomat Spinnaker Cars.
Spinnaker Pole Mast Eye: NG1-37: Fixed Eye for attachment of whisker or spinnaker pole on the front of the mast. Used where vertical adjustment of inboard pole end is not required. Diamond shaped SS pad is curved to fit the front of the Mast and has welded horizontal Ring. Unit is 65mm (2 3/16") high x 76mm (3") wide, and attaches to Mast with (4) 1/4" screws or rivets. 8mm Ring has 50mm (2") ID.
NG2 Reaching Strut Mast Eye: NG2-38: Diamond shaped SS Reaching Strut Mast Eye with welded vertical Eye. Unit is 115mm (4 1/2") high x 73mm (2 7/8") wide, and attaches to the side of the Mast with (4) 1/4" screws or rivets. 10mm Eye has (minimum) 40mm (1 1/2") ID.

NG-70 Mast – Exit Plates Several varieties of Exit Plates are used on the NG-70 Mast Section, See Isomat Exit Plates.

NG-70 Mast – Cleats Several sizes of Cleats are used on the NG-70 Mast Section, See Isomat Cleats.

NG-70 Mast – Mainsail Gates
NG2 Mainsail Gate & Screw Kit: NG2-9K: Cast aluminum Mainsail Gate fits NG-60 through NG-105 Mast Sections. Gate has horizontal slot for Thumbscrew (*NGA-10); Gate is 'opened' by loosening Thumbscrew and sliding gate away from Mainsail track. Kit includes Gate casting, NG2-9, and SS Thumbscrew, NGA-10*.
	NG2 Mainsail Gate: NG2-9: Cast aluminum Mainsail Gate fits NG-60 through NG-105 Mast Sections. Gate casting is 2 3/8" (60mm) high x 1 7/16" (36mm) wide, with 1/4" (7mm) deep lip. Part is marked 157007.
	NG2 Mainsail Gate Screw: NGA-10: SS Thumbscrew is 4mm diameter with 5/8" (15mm) long thread and has serrated plastic head.
	NG2 Mainsail Gate Screw - All Stainless: NGA-10SS: All Stainless Thumbscrew is 4mm diameter with 5/8" (15mm) long thread and knurled head.
	Mainsail Gate Rivet Nut: NGA-10RN: 4mm Aluminum Rivet Nut is often used to seat NGA-10 Thumbscrews. Rivet Nut is installed in a 6mm (15/64") hole with a special Rivet Nut Tool. Please note that some Masts have been produced with the Mast tapped directly for the Thumbscrew, and do not use this item.
	Mainsail Gate Rivet Nut Tool: NGA-10RNTool: Special Tool for installing 4mm Aluminum Mainsail Gate Rivet Nut includes two (2) Rivet Nuts. Rivet Nut is installed in a 6mm (15/64") hole, Tool requires use of a 7/8" and a 11/16" wrench (not included).

Deck Strut Bracket
*Deck Strut / Diamond Bracket - Port: NG2-49P:* *Deck Strut / Diamond Bracket - Starboard: NG2-49S:* Special SS Brackets are mounted on either side of mast above gooseneck bracket and are used to attach Deck Strut Eye fitting, NG2-49E, and Diamond Stay on some B&R Rigs. Contoured Bracket includes 3/8" Pin for attachment of lower Diamond stay, and 1/2" Pin for attachment of Deck Strut. Unit is (maximum) 6 3/4" high x 3 3/8" wide, width between Tabs is 1". Bracket attaches to Mast with four (4) 5/16" RH screws. Special as used on Hunter 410 and 450. 157222
	*Deck Strut Eye for Diamond Bracket - 1/2": NG2-49E:* Special SS pivoting Ball Eye connects Deck Strut to NG2-49 Diamond Bracket lower Pin. Eye has 1/2" Pin hole, shank is threaded for a 1/2-20 RH stud. Unit is (maximum) 1 3/8" wide x 3/4" thick x 2 3/4" long.

AutoReef Fairlead
*AutoReef Fairlead: NGA-65:* SS AutoReef Fairlead is mounted on either side of mast above gooseneck bracket. Acts as fairlead for reef line and stop for sail when reefed with AutoReef (single line) reefing system. Flattened SS ring is welded to diamond shaped SS plate. Ring is 32mm (1 1/4") OD x 16mm (5/8") ID, plate is 65mm (5/8") high x 40mm (1 5/8") wide and is fastened with four (4) 1/4" (6mm) rivets. For details, See: Isomat AutoReef System.

NG-70 Mast - Gooseneck Brackets & Hardware
*NG2 Gooseneck Bracket: NG2-11:* Cast aluminum Gooseneck Mast Bracket for use with NB-32, NB-40, and NB-55 new-style Gooseneck Assemblies. Bracket fits NG-51 through NG-86 Mast Sections and is fastened with eight (8) 1/4" (6mm) rivets. Bracket has 22mm (7/8") hole at top and 8mm (5/16") hole on bottom side, for use with any of the NB2-1 Vertical Gooseneck Toggle Pins. For Gooseneck Parts not listed below, See NB-32, NB-40, or NB-55 Boom Section.
NB2 Gooseneck Toggle Ass'y w/ Reef Hooks: NB2-1A: Vertical Gooseneck Toggle Pin Assembly with Tack Shackle and Reef Hooks is used to attach the NB2 Gooseneck to Isomat Gooseneck Mast Bracket (NG2-11). SS Toggle Pin has 2 integral Reef Hooks and is 22mm (7/8") diameter with an 8mm (5/16") threaded stud on the bottom, with washer and SS Locknut. Assembly includes Tack Shackle (NB2-2) and Horizontal Gooseneck Pin (NB2-3).
NB2 Gooseneck Toggle Pin w/ Reef Hooks: NB2-1: Vertical Gooseneck Toggle Pin with Reef Hooks includes washer and SS Locknut. As NB2-1A, above, but without Tack Shackle and Horizontal Gooseneck Pin. SS Toggle Pin has 2 integral Reef Hooks and is 22mm (7/8") diameter with an 8mm (5/16") threaded stud on the bottom, and has (2) 10mm (3/8") cross-holes for Tack Shackle and Horizontal Gooseneck Pin.
	NB2 Tack Shackle: NB2-2: SS Tack Shackle fits through hole in top of NG2 Vertical Gooseneck Toggle Pins. Shackle has 8mm (5/16") pin, throat width is 22mm (7/8").
	Replacement Screw Pin for NB2-2 Tack Shackle: NB2-2SP: Replacement Screw Pin only for NB2-2 Tack Shackle. Screw Pin has 8mm thread.
	NB2 Horizontal Gooseneck Pin: NB2-3: Clevis Pin is 10mm (3/8") dia. x 49mm (2") long. Used to attach the NB2 Gooseneck to Isomat Vertical Gooseneck Toggle Pin (*NB2-1*).
NB2 Gooseneck Toggle Ass'y w/ Shackle: NB2-1ARA: Vertical Gooseneck Toggle Pin Assembly is used to attach the NB2 Gooseneck to Isomat Gooseneck Mast Bracket (NG2-11). For use with AutoReef Systems not requiring Reef hooks. SS Toggle Pin is 22mm (7/8") diameter with an 8mm (5/16") threaded stud on the bottom, with washer and SS Locknut. Assembly includes Tack Shackle (*NB2-2) and Horizontal Gooseneck Pin (NB2-3*).
	NB2 Gooseneck Toggle Pin - AR: NB2-1AR: Vertical Gooseneck Toggle Pin includes washer and SS Locknut. As NB2-1ARA, above, but without Tack Shackle and Horizontal Gooseneck Pin. For use with AutoReef Systems not requiring Reef hooks. SS Toggle Pin is 22mm (7/8") diameter with an 8mm (5/16") threaded stud on the bottom, and has (2) 10mm (3/8") cross-holes for Tack Shackle and Horizontal Gooseneck Pin.
NB2 Old-Style Gooseneck Toggle Pin: NB2-1XP: Vertical Gooseneck Toggle Pin Assembly is used to attach the NB2 Gooseneck to Isomat Gooseneck Mast Bracket (*NG2-11). Has 10mm (3/8") cross pin at top for using the Old-Style Reef Hook/Tack Assembly (NB2-5X). SS Toggle Pin is 22mm (7/8") diameter with an 8mm (5/16") threaded stud on the bottom, has 10mm (3/8") cross-hole for Horizontal Gooseneck Pin (NB2-3*), and includes washer and SS Locknut.
	NB2 Old-Style Reef Hook/Tack Attachment: NB2-5X: Old-Style formed combination SS Reef Hook and Tack anchor is passed through the tack grommet in sail and clipped over horizontal cross pin in top of special 22mm gooseneck pin, NG2-1XP. Formed from heavy 10mm (3/8") SS rod, unit measures a maximum of 4" (100mm) high x 3 1/2" (90mm) wide.
NG2 Old-Style Gooseneck Bracket: NG2-11X: Old-Style Cast aluminum Gooseneck Mast Bracket fits NG-51 through NG-86 Mast Sections, for use with NB-32, NB-40, and NB-55 old-style Gooseneck Assemblies. Bracket is 3 7/8" (98mm) high x 3 1/2" (90mm) wide, and is fastened with eight (8) 1/4" (6mm) rivets. Bracket has hole for 10mm (3/8") Vertical Pin, NB2-1XA, used with SS Gooseneck Toggle NB2-2XA. For parts associated with this Gooseneck Bracket, See NB-32, NB-40, or NB-55 Old-Style Gooseneck Assemblies.

NG-70 Mast – Winch Pads
NG-70 Side Winch Pad - Clear Anodized: NG70-20: Formed aluminum Bracket fits either side of NG-70 Mast Section. Winch mounting surface on Bracket is 5 1/2" (140mm) high x 5 1/4" (132mm) wide. Anodized Bracket is 3/16" (5mm) thick and fastens to Mast with eight (8) 1/4" (6mm) rivets. 67,60
NG-70 Aft Winch Pad - Clear Anodized: NG70-21: Formed aluminum Bracket fits aft side of NG-70 Mast Section. Designed to mount under the Boom for use with a Reef line winch. Winch mounting surface on Bracket is 5 1/8" (130mm) high x 4 5/8" (118mm) and angles aft approximately 12 degrees to align Winch with Outhaul or Reef lines exiting from Boom. Anodized Bracket fastens to Mast with eight (8) 1/4" (6mm) rivets. 60,0

NG-70 Mast - Vang Brackets & Hardware Brackets are available with Toggles to fit any type of Vang. Isomat Masts were often supplied with an Isovang solid Vang as standard equipment, they are also commonly added to boats originally supplied without one. See: Isomat Isovangs, and Isomat Vang Brackets & Toggles.
NG2 Vang Bracket: NG2-12: Cast aluminum Vang Bracket fits NG-51 through NG-86 Mast Sections. Bracket is 4 3/4" (120mm) high x 3 1/2" (90mm) wide, and is fastened with eight (8) 1/4" (6mm) rivets. Bracket has 22mm (7/8") hole at top and 14mm (9/16") hole on bottom side, for use with the NG2-14A Vertical Vang Toggle Pin Assembly, and any of the NG2 Vang Toggles, See: Isomat Vang Brackets & Toggles.
NG2 Vang Toggle Pin Ass'y: NG2-14A: Assembly converts NG2 Vang Bracket, NG2-12, for use with any of the NG2 Vang Toggles listed below. Includes Vang Toggle Pin (*NG2-14), NG2 Vang Bushing (NG2-13*), and SS Cotter Ring.
	NG2 Vang Toggle Pin: NG2-14: SS Clevis Pin is 14mm (9/16") diameter with a 125mm (5") grip length, and has 8mm (5/16") hole for Cotter Ring or Block attachment. Fits vertically in NG2-12 Vang Bracket.
	NG2 Vang Bushing: NG2-13: SS Bushing is used in upper hole of NG2-12 Vang Bracket to adapt it for use with Vang Toggle Pin (NG2-14). Bushing is 22mm (7/8") OD x 14mm (9/16") ID x 16mm (5/8") long.
NG2 Vang Bracket Ass'y w/ Toggle for 3/8" (10mm) Pin: NG2-17A-10: NG2 Vang Bracket Ass'y w/ Toggle for 1/2" (12mm) Pin: NG2-17A-12: *NG2 Vang Bracket Ass'y w/ Toggle for 5/8" (16mm) Pin: NG2-17A-16:*
Complete NG2 Vang Bracket Assembly with Toggle for Vang is available in various Pin sizes. Assembly consists of Vang Bracket NG2-12, Vang Toggle Pin Assembly NG2-14A, and one of the NG2-17 Vang Toggles. Assembly is fastened to Mast with eight (8) 1/4" (6mm) rivets or screws. Please Note that all Vang Toggles shown here (and others) are available separately, See Isomat Vang Brackets & Toggles.
*NG2 Vang Bracket Ass'y w/ 7/8" Toggle: NG2-19A:* Complete NG2 Vang Bracket Assembly with Toggle for Vang with 22mm (7/8") Pin. Assembly consists of Vang Bracket (NG2-12), Vang Toggle Pin Assembly (NG2-14A), and NG2-19 Vang Toggle with 22mm (7/8") hole. Assembly is fastened to Mast with eight (8) 1/4" (6mm) rivets or screws. For use with the NG2 Isovang. Also recommended for use with Soft (block and tackle) Vangs, as the large hole will accommodate any shackle.
*Triple Vang Bail: NGA-69:* SS Welded Vang Bail fits NG-70 and similar Mast Sections. Allows for multiple attachment of vang and other items. SS 10mm rod is welded to heavy plate, plate is 100mm (4") high x 85mm (3 1/2") wide and is attached to mast with (6) 1/4" (6mm) fasteners. 557104

NG-70 Mast - Welded Mast Base Exit Boxes Some Isomat Masts have Welded Exit Boxes at the base of the mast for leading internal halyards out of the Mast at Deck level, rather than higher on the mast using standard Exit Plates. Halyards exit the Mast angled aft, toward the cockpit, eliminating the need for any additional hardware at the base of the Mast. Welded Exit Boxes are especially common on Cruising Yachts. The NG-70 Mast Section would normally use NG2 Welded Exit Boxes, See Welded Mast Base Exit Boxes.

NG-70 Mast - Deck Collars, Mast Boots & Hardware
NG-70 Mast Boot: NG70-15B: Heavy molded Black Rubber Boot for use with NG-70 and larger NG Mast sections. Lower side of Boot fits over Deck Collar, upper side fits Mast section. 17,105
NG-70 White Mast Boot - Special for 7-Bail Deck Collar: NG70-15B-10:
Deluxe Hard molded White PVC Mast Boot to fit NG-70 Mast Section and 7-Bail Deck Collar, NG60-10, below. White PVC Mast Boot is 10 1/2" long x 2 1/2" high. As used on O'Day 39.
NG-70 Mast Boot Clamp: NG70-16M: All Stainless Steel Clamp for use with Mast Boot on NG-70 Mast.
NG-70 Deck Collar Boot Clamp: NG70-16D: All Stainless Steel Clamp is suitable for use with Mast Boots on all NG-70 Deck Collars.
*Mast Collar Wedge – Small Rubber: NGA-18:* Heavy Extruded Rubber Wedge for use with Isomat and other Masts. Small stepped Rubber Wedge is used to support the mast as it passes through the Deck Collar. Wedge is 2 3/4" (70mm) long x 1 1/8" (28mm) wide, and is 15/16" (24mm) thick at the top tapering to 3/8" (10mm) thick at the bottom.
*Mast Collar Wedge – Large Rubber: NGA-19:* Heavy Extruded Rubber Wedge for use with Isomat and other Masts. Large stepped Rubber Wedge is used to support the mast as it passes through the Deck Collar. Wedge is 2 3/4" (70mm) long x 1 1/8" (28mm) wide, and is 1 3/16" (30mm) thick at the top tapering to 11/16" (18mm) thick at the bottom.

NG-70 Deck Collar – 7 Bail Type: NG60-10: Cast Aluminum Deck Collar for use with NG-60 & NG-70 Mast Sections. Deck Collar has provisions for 7 bails ((1) NG2-20, aft, and (6) NG1-20, on the sides), for attachment of a soft Boom Vang and up to 6 standard blocks. Cast Deck Collar is 12 3/8" (313mm) long x 9 1/2" (243mm) wide, and fastens to deck with (6) 1/4" (6mm) screws. Maximum inside dimensions 9 1/2" x 6 3/16".
NG1 Deck Collar Bail: NG1-20: SS Formed Bail is used for attachment of blocks and lines. Fits in integral slots in sides of NG70 and smaller Deck Collars. Bails are installed from underside of Deck Collar Casting, Deck Collar must be removed to install Bails. Bail is made from 8mm (5/16") rod, and is 2 1/16" (53mm) long x (maximum) 1" (25mm) high.
NG2 Deck Collar Bail: NG2-20: SS Formed Bail is used for attachment of Boom Vang. Fits in integral slot in aft side of Deck Collar. Bail is installed from underside of Deck Collar Casting, Deck Collar must be removed to install Bail. Bail is made from 10mm (3/8") rod, and is 2 3/4" (70mm) long x (maximum) 1 15/16" (50mm) high.
NG-70 Deck Collar – New Style: NG70-12: Cast Aluminum Deck Collar for use with NG-70 & NG-80 Mast Sections. Deck Collar has provisions for 14 new-style Mast Base Block Studs and a SS Bail, NG2-20, for attachment of a soft Boom Vang. Nut slots on underside of casting and 12mm holes allow for attachment of NG1 or NG2 threaded Block Studs and/or Mast Base Turning Blocks, NGA-40 or NGA-41, without unfastening Deck Collar. Includes four (4) provisions for deck tie-down turnbuckles, and slots for (2) NGA-18 and (4) NGA-19 Mast Wedges. Cast Deck Collar is 14 1/8" (360mm) long x 11 1/4" (285mm) wide, and fastens to deck with (6) 3/8" (10mm) screws. Maximum inside dimensions 9 13/16" x 7 11/16". Bcirc. 32 1/2" 020,80
NG-70 Simple Deck Collar � Special - Island Packet: NG70-13: Simple Aluminum Deck Collar for use with NG-70 Mast Section provides a clean, uncluttered look without any attachment provisions. Cast Deck Collar is 11 5/8" (295mm) long x 10 1/8" (260mm) wide x (maximum) 1 5/8" high, and is undrilled to accept all mounting variations. Maximum ID is 9" x 6 3/8". As used on Island Packet, and others. 560000 Bcir 27.25.

Deck Tie-Down Bracket: PP M2259: Deck Tie-Down Bracket is attached to the mast, for use with a tie rod to hold the deck in place under rigged loads. Black epoxy-coated cast aluminum Bracket has curved mounting base to suit a wide variety of mast sections. Mounting base is 4" long x 2" wide, original unit was attached to the mast with (2) 5/16" screws on 2 1/2" vertical centers. New, improved version has same hole spacing as original, but can be attached to the mast with up to (4) 5/16" screws. Bracket projects 2" from mast surface and has a hole for a 3/8" tie rod 1 5/16" from mast. As used on a variety of Pearson Yachts, including Pearson 36-2.

NG-70 Mast - Mast Steps
NG-70 Mast Step – 5 Bail Type: NG70-2: Cast Aluminum Mast Step for use with NG-70 Mast Section. Mast Step has provisions for 5 bails (*NG2-20*), for attachment of a soft Boom Vang and up to 4 standard blocks. Cast Mast Step is 10 5/8" (270mm) long x 8" (203mm) wide, and fastens to deck or keel with (4) 5/16" (8mm) FH Screws on 9" (230mm)(66fore & aft) x 6 3/8" (160mm) (athwartships) centers. 134
NG-70 Mast Step – Block Stud Type: NG60-4: Cast Aluminum Mast Step for use with NG-60 & NG-70 Mast Sections. Mast Step has provisions for 10 clevis-pin like 12mm Block Studs, NG2-21, for attachment of Blocks with Bolt for Block Studs for leading halyards aft, and a bail (*NG2-20*), for attachment of a soft Boom Vang. Block Studs insert in recessed 12mm holes from underside of casting and have a 6mm (1/4") hole for block attachment. Mast Step must be removed to install Block Studs. Cast Mast Step is (maximum) 11" (280mm) long x 9 1/2" (240mm) wide, and fastens to deck or keel with (6) 5/16" (8mm) FH Screws.
NG-70 Mast Step – New Style: NG60-5: Cast Aluminum Mast Step for use with NG-60 & NG-70 Mast Sections. Mast Step has provisions for 8 removable Mast Base Block Studs and a SS Bail, NG2-20, for attachment of a soft Boom Vang. Nut slots on underside of casting and 12mm holes allow for attachment of NG1 or NG2 threaded Block Studs, and/or Mast Base Turning Blocks, NGA-40 or NGA-41, without unfastening Mast Step. Cast Mast Step is 11 1/8" (285mm) long x (maximum) 8 3/4" (220mm) wide, and fastens to deck or keel with (4) 1/4" (6mm) FH Screws on 8 7/8" (225mm) (fore & aft) x 4 3/4" (120mm) (athwartships) centers. Unit is marked 556180.
	NG2 Mast Step Block Stud: NG2-21: SS Clevis Pin-shaped Block Stud is used for attachment of shackle or block to lead halyards aft. Fits in integral recessed hole in a variety of Mast Steps. Block Stud is installed from underside of Mast Step Casting, Mast Step must be removed to install Block Studs. Small head Block Stud is 12mm diameter x 45mm (1 3/4") long (maximum), with a 30mm (1 3/16") grip length and a 6mm (1/4") hole for shackle pin or Block bolt.
	NG2 Mast Step Bail: NG2-20: SS Formed Bail is used for attachment of Boom Vang or/and standard blocks for leading halyards aft. Fits in integral slots in NG46 and larger Mast Steps. Bail is installed from underside of Mast Step Casting, Mast Step must be removed to install Bail(s). Bail is made from 10mm (3/8") rod, and is 2 3/4" (70mm) long x (maximum) 1 15/16" (50mm) high.
NG-70 Mast Step – Special: NG70-6: Cast Aluminum Mast Step for use with NG-70 Mast Section. Mast Step has provisions for a SS Bail, NG2-20, for attachment of a soft Boom Vang, and multiple removable Blocks attached to optional SS Rods (under the casting). Cast Mast Step is 13 3/8" (340mm) long x 10 3/8" (265mm) wide, and fastens to deck or keel with (4) 5/16" (8mm) FH Screws on 8 1/2" (215mm) (fore & aft) x 6 1/4" (160mm) (athwartships) centers. Unit is marked 556182. As used on Beneteau Oceanis 400. RRP F580,F560E
NG-70 Mast Step – Special Keel: NG70-1SK: Special welded Aluminum Mast Step for use with Keel stepped NG-70 Mast Section. Clear Anodized Mast Step has (2) two slots on each end that are 1/2" wide x 2 1/2" long on 4 1/2" (athwartships) centers. Mast Step is 15" (380mm) long x 6 1/2" (165mm) wide x 1/4" (6mm) thick, and fastens to keel with (4) Hex head bolts. As used on Pearson 422 and others. PXmc

NG-70 Internal Waterproofing Plug: NG70-WP: Internal Waterproofing Plug is installed in Keel-stepped Masts to prevent water intrusion below deck. Assembly consists of 2 plastic pieces carefully cut to fit Mast interior with central PVC standpipe to allow passage of electrical wires. Unit slides up from the bottom of the Mast to a point just above Deck level where a hole is drilled in Mast to allow for application of expanding foam between plastic pieces. Second hole is drilled just above upper plastic piece to allow water drainage.
	Internal Waterproofing Foam: NGA-Foam: Expanding foam is used for installation of Internal Waterproofing Plug. Single-use can is sufficient for installation of any Internal Waterproofing Plug.

NG-70 Mast Base Halyard Turning Blocks A variety of Mast Base Turning Blocks and Block Studs are used with the NG-70 Mast Steps and Deck Collars, See Isomat Mast Base Turning Blocks.

Your cart

Spars, Rigging, and Hardware for Sailboats

NG-70 Mast Components
Masthead Parts Jumper Strut Fittings Jib Boxes & Forestay Attachments Exit Blocks Spreaders Spreader Bases Spinnaker Cars Exit Plates Cleats	Mainsail Gates Gooseneck Brackets Winch Pads Vang Brackets & Hardware Mast Base Halyard Exit Boxes Deck Collars, Mast Boots & Hardware Mast Steps Internal Waterproofing Mast Base Halyard Turning Blocks


NG-70 Mast – Masthead Parts NG2 Mastheads are cast from high-strength Aluminum alloy, and are welded into the mast section. Isomat NG2 Mastheads are easily identified by having 4 sheaves (or provision for 4 sheaves) side by side, on the forward side. For Details, See: NG2 Masthead Assembly.
NG2 Masthead Cover Plate: NG2-1: Cast aluminum Masthead Cover Plate for NG2 standard Masthead. Masthead Cover Plate also provides level surface for mounting Anchor light and has holes and slots for exiting other electrical wires. Unit is 10 1/4" (260mm) long (maximum) x 7 1/8" (180mm) wide, and is fastened with two (2) 6mm screws, NG2-1S, that thread into tapped holes in Masthead.
NG2 Masthead Spinnaker Crane: NG2-2: Heavy SS Masthead Spinnaker Crane is designed to attach to standard Isomat NG2 Masthead. Crane allows for off-center attachment of one or two standard swivel blocks for external spinnaker halyards, See Spinnaker Halyard Blocks. This method of running spinnaker halyards has less friction and eliminates the chafe on halyards that is inherent in the standard internal halyard design – it is the only choice for long-distance racing or cruising. Halyards can be led internally; running from the swivel block to an entrance 5-8 feet down from the masthead, but this method does add a potential chafe spot. Attaches with (4) 5/16" (8mm) bolts and locknuts. SS Plate is (maximum) 4" long x 5 3/8" wide x 1/4" thick, and projects 1 3/8" forward of the masthead. Easily positioned on the masthead, mounting requires drilling (4) 5/16" holes in the masthead. Unit comes complete with fasteners.