Isomat BF4 Spreader

Please Note: Early version of the BF-4 Spreader (pre-1985) had similar outside dimensions (98 x 30mm) but had no 'tail'. Spreaders were supplied with a cut and welded taper (to 3" x 7/8"), and a welded tip. While the Old-style BF-4 Spreaders and extrusion are no longer available, the original welded tip, BF4-1XA, detailed below, is. Note: Old-style BF-4 Spreaders and Spreader Bases are not compatible with the New-style BF-4 Spreaders or Spreader Bases shown here.
BF-4 Spreaders Spreader Tips & Components Spreader Bases & Components Spreader Bars & Components

BF-4 Standard Spreader Assembly, Complete: BF4SAC-____: Standard BF4 Spreader Assembly is anodized, Tapered, drilled for attachment to standard Cast Spreader Bases, and includes BF4-1K Spreader Tip Assembly. To order: specify maximum tube length, and sweepback angle (if any). For Spreaders used with Spreader Bars for Stemball seats, specify Port or Starboard and the part number of the Spreader Bar, as well. Specify Spreader Tip if other than the BF4-1K Spreader Tip is required. Painted finishes are available on special order, specify color.
BF-4 Standard Spreader Tube Only, Tapered & Drilled: BF4TT-____: For replacement purposes when using original end fittings, BF4 Spreader Tubes are available anodized and Tapered with inboard angles cut, and drilled for attachment to standard Cast Spreader Bases and Tip. To order: specify maximum tube length, and sweepback angle (if any), for Spreaders used with Spreader Bars for Stemball seats, specify Port or Starboard and the part number of the Spreader Bar, as well. Painted finishes are available on special order, specify color.
*BF-4 Spreader Section, Clear Anodized: BF4CA-____:* BF4 Spreader Section is available clear anodized, but without taper or drilling at lengths up to 20'. To order specify maximum length.

Spreader Tips & Components for BF4 Spreaders
*Spreader Tip Assembly for BF-4 Spreader - Standard: BF4-1K:* Assembly features smooth Outer Tip to capture shrouds, and Inner Tip casting that rests against the Spreader Section and provides a seat for up to 2 shrouds. Kit includes Outer & Inner Tip Castings, Spreader Boot, & screw, for 1 Spreader. For use on rigs with Continuous Shrouds up to 10mm (3/8") diameter.
	Outer Tip Casting for BF-4 Spreader: BF4-2: Smooth Outer Tip Casting captures shrouds and fastens to Spreader with (1) #10 SS Screw. Aluminum Spreader Tip is (maximum) 3" (77mm) fore & aft and extends 1" beyond Spreader tube.
	Inner Tip Casting for BF-4 Spreader: BF4-3: Inner Tip Casting provides seats for 2 shrouds and protects Spreader tube from chafe. Inner Tip Casting is (maximum) 1 7/8" (47mm) fore & aft.
	Spreader Boots for BF-4 Spreader: BF4-4P: White molded vinyl boot protects sails from chafing against Continuous Spreader Tip. Spreader Boots are sold in pairs only.
*Flag Halyard Eye for BF-4, Continuous Tip: BF4-5C:* Optional SS Flag Halyard Eye fits in slot on underside of Continuous Spreader Tip Casting BF4-2, and provides for attachment of Flag halyard with or without a block.

Triple Shroud Spreader Tip for BF-4 Spreader: BF4-Z3: Triple Shroud Spreader Tip for BF4 Spreader is designed for use as the lower Spreader Tip on a 3 Spreader Rig, but can be used with 1 or 2 shrouds. Continuously rigged shrouds are captured by smooth outer casting that is attached to the base casting with one screw. Recessed Allen head cap screw (6mm) threads into captive locknut in base casting. Anodized cast aluminum Tip is (maximum) 3 3/4" (94mm) long x 1 1/2" (38mm) wide and projects 1 1/8" (29mm) from end of spreader tube. Please Note: When used with this Tip BF-4 Spreader Section is cut with half the usual Taper; only 12mm (1/2") of the 'tail' is removed from the Spreader end. Z4121,4122/Z-3109I

Rod Spreader Bend Tip for BF-4 Spreaders: BF4-19A: BF-4 Spreader Tip for use with standard Rod Spreader Bends. Anodized cast aluminum Tip has a 1/2" slot with a SS Cover Plate and is 3/4" thick (at hole). SS Cover Plate is 5/8" wide x 2 3/8" long and fastens to Tip with (2) 5mm x 12mm RH screws. Unit projects (maximum) 1" (25mm) from end of spreader tube. 162261M

Spreader Tip for BF-4 OLD-STYLE Spreaders: BF4-1XA: Spreader Tip for BF-4 Old-style Spreaders. Tip is welded to BF-4 Old-style Spreader tapered to 3" x 7/8". Cast aluminum Spreader Tip is (maximum) 3" long x 7/8" thick, and extends 1 5/8" beyond Spreader tube. Includes 6mm SS retaining screw to captivate shroud. Please Note: Old-style BF-4 Spreader had similar dimensions to the current BF-4, but had no 'tail'. Old-style BF-4 Spreaders and extrusion are no longer available. Old-style BF-4 Spreaders and Spreader Bases are not compatible with the BF-4 Spreaders or Spreader Bases shown here. 304201

Discontinuous Spreader Tips for BF4 Spreaders
BF-4 Discontinuous Spreader Tip w/ 8mm Pin: BF4-8A: BF-4 Discontinuous Spreader Tip w/ 9mm Pin: BF4-9A: BF-4 Discontinuous Spreader Tip w/ 10mm Pin: BF4-10A: BF-4 Discontinuous Spreader Tip w/ 11mm Pin: BF4-11A: BF-4 Discontinuous Spreader Tip w/ 12mm Pin: BF4-12A: BF-4 Discontinuous Spreader Tip w/ 14mm Pin: BF4-14A: BF-4 Discontinuous Spreader Tip w/ 16mm Pin: BF4-16A: Standard Assembly provides horizontal pin for attachment of Discontinuous Shrouds. Includes anodized cast aluminum tip with horizontal pin and cotter pin. Unit projects (maximum) 1 3/4" (45mm) from end of spreader tube. Slot width (at pin) is 1 5/8" (41mm), pin center is 1 1/16" (27mm) from tube end.
	Casting Only for BF-4 Discontinuous Spreader Tip – 8mm: BF4-8: Casting Only for BF-4 Discontinuous Spreader Tip – 9mm: BF4-9: Casting Only for BF-4 Discontinuous Spreader Tip – 10mm: BF4-10: Casting Only for BF-4 Discontinuous Spreader Tip – 11mm: BF4-11: Casting Only for BF-4 Discontinuous Spreader Tip – 12mm: BF4-12: Casting Only for BF-4 Discontinuous Spreader Tip – 14mm: BF4-14: Casting Only for BF-4 Discontinuous Spreader Tip – 16mm: BF4-16:
	As BF4 Discontinuous Spreader Tip Assemblies above, but without pins.
	8mm Pin for BF-4 Discontinuous Spreader Tip: BF4-8P: 9mm Pin for BF-4 Discontinuous Spreader Tip: BF4-9P: 10mm Pin for BF-4 Discontinuous Spreader Tip: BF4-10P: 11mm Pin for BF-4 Discontinuous Spreader Tip: BF4-11P: 12mm Pin for BF-4 Discontinuous Spreader Tip: BF4-12P: 14mm Pin for BF-4 Discontinuous Spreader Tip: BF4-14P: 16mm Pin for BF-4 Discontinuous Spreader Tip: BF4-16P: SS Pins only for Standard Single Pin BF4 Discontinuous Spreader Tip Assemblies, above. Pins are 72mm (2 7/8") long.
Spreader Boots for BF-4 Discontinuous Spreader Tip: BF4-4DP: White molded vinyl boot protects sails from chafing against Standard Single Pin Discontinuous Spreader Tip, above. Spreader Boots are sold in pairs only.
*Flag Halyard Eye for BF-4 Discontinuous Tip: BF4-5D:* Optional SS Flag Halyard Eye fits in slot on underside of Standard Discontinuous Spreader Tip Castings BF4-8 through BF4-16, above, and provides for attachment of Flag halyard with or without a block.

BF-4 Dual Pin Spreader Tip � 16mm/12mm: BF4-Z1612: BF-4 Dual Pin Spreader Tip � 16mm/14mm: BF4-Z1614: Dual Pin Spreader Tip for BF4 Spreader incorporates a 16mm Pin outboard for the main shrouds, and a 12 or 14mm inboard Pin for intermediate shrouds, Pins are sold separately. Design allows for Discontinuous or Continuous Diagonal shrouds. Anodized cast aluminum Tip projects (maximum) 3 15/16" (100mm) from end of spreader tube. Slot width (at outboard pin) is 1 5/8" (40mm), pin center is 2 1/2" (62mm) from tube end. Inboard Pin has slot width of 1/2" (12mm), small pin center is 1" (25mm) from tube end. Z-4121,4122I
	12mm Pin for BF-4 Dual Pin Tip Casting: BF4-Z-1326: 14mm Pin for BF-4 Dual Pin Tip Casting: BF4-Z-1324: 16mm Pin for BF-4 Dual Pin Tip Casting: BF4-Z-1325: SS Pins only for BF4 Dual Pin Discontinuous Spreader Tip, above. 12mm Pins are 72mm (2 7/8") long, 14 and 16mm Pins are 87mm (3 7/16") long.

BF-4 Stemball Seat Spreader Tip w/ 12mm Pin: BF4-12SA: BF-4 Stemball Seat Spreader Tip w/ 14mm Pin: BF4-14SA: BF-4 Stemball Seat Spreader Tip w/ 16mm Pin: BF4-16SA: BF-4 Stemball Seat Spreader Tip w/ 18mm Pin: BF4-18SA: Stemball Seat Spreader Tip Assembly for BF4 Spreader provides enclosed horizontal pin for attachment of Vertical Shrouds and recessed seat for NG1 Stemball on Diagonal Shrouds up to 9/32" or 7mm. Anodized cast aluminum Tip is (maximum) 3 1/8" (82mm) wide and projects 3 13/16" (97mm) from end of spreader tube. Slot width is 2 1/16" (52mm), Pin center is 2 7/16" (62mm) from tube end, Stemball seat (for 26mm cup washer) center is 3/4" (20mm) from tube end. As used on Jeanneau Sun-Odyssey 409 (lower spreader), and others.
	BF-4 Stemball Seat Tip for 12mm/14mm Pin: BF4-14SC: BF-4 Stemball Seat Spreader Tip for 16mm Pin: BF4-16SC: BF-4 Stemball Seat Spreader Tip for 18mm Pin: BF4-18SC: Casting only, as used in for BF4 Stemball Seat Spreader Tip, above. Anodized cast aluminum Tip is (maximum) 3 1/8" (82mm) wide and projects 3 13/16" (97mm) from end of spreader tube.
	12mm Pin for BF-4 Stemball Seat Tip: BF4-12SAP: 14mm Pin for BF-4 Stemball Seat Tip: BF4-14SAP: 16mm Pin for BF-4 Stemball Seat Tip: BF4-16SAP: 18mm Pin for BF-4 Stemball Seat Tip: BF4-18SAP: SS Pins only for BF4 Stemball Seat Discontinuous Spreader Tip, above. All Pins are 78mm (3 1/16") long. 12mm Pins are Assemblies specially machined to fit in 14mm Pin hole.
BF-4 Spreader Tip for ACMO Shroud Link: BF4-AC16: Special Spreader Tip for BF4 incorporates a 16mm Pin (sold separately) in a rectangular slot for use with ACMO rectangular SS shroud link. Eye on V1 shroud attaches to 16mm Pin, ACMO shroud link (sold separately) fits over eye and hinges on same 16mm Pin. Anodized cast aluminum Tip projects (maximum) from end of spreader tube. Slot measures , pin center is from tube end. ACMO rectangular SS shroud links accept Stemball Turnbuckles for D2 and V2 shrouds, and are available in a variety of sizes depending on shroud diameters. As used on Beneteau First 42s7, (lower spreader), and others. **
	16mm Pin for BF-4 ACMO Tip Casting: BF4-AC16P: SS Pin only for BF4 ACMO Discontinuous Spreader Tip, above. Pin is 16mm x long.

BF-4 Spreader Tip for Tip Cup, 1.65": BF4-NL400-D1.65: BF-4 Spreader Tip has a 1.66" (42mm) hole for Spreader Tip Cup. Designed for Navtec L400 Tip Cups, L500 Tip Cups with -10 or -12 VL's, and others with similar dimensions. Anodized cast aluminum Tip has a 1.660" Tip Cup hole, is .745" thick (at hole) and has outboard hole for 5/16" (8mm) anti-rotational lock pin. Unit features appropriate clearances for Tip Cup and projects (maximum) 2 3/4" (70mm) from end of spreader tube. Tip Cup hole center is 1.65" (42mm) from tube end. As used on Beneteau First 40.7 (middle spreader), and others. Item is marked 162261.
BF-4 Spreader Tip for Tip Cup, 1.75": BF4-NL528-D1.75: BF-4 Spreader Tip has a 1.76" (45mm) hole for Spreader Tip Cup. Designed for Navtec L528 Tip Cups with -12 to -22 VL's; OS standard Tip Cups for up to -12VL's, -10 VU's and -8 D's, and others with similar dimensions. Anodized cast aluminum Tip has a 1.760" Tip Cup hole, is .920" thick (at hole) and has slot (top & bottom) for anti-rotational lock pin. Unit features appropriate clearances for Tip Cup and projects (maximum) 2 3/4" (70mm) from end of spreader tube. Tip Cup hole center is 1.65" (42mm) from tube end.
BF-4 Spreader Tip for Tip Cup, 1.85": BF4-NL528-D1.85: BF-4 Spreader Tip has a 1.85" (47mm) hole for Spreader Tip Cup. Designed for Navtec L500 Tip Cups with -17 VL's, and L528D Tip Cups using -22 VL's, -12 VU's, unit is also suitable for other Tip Cups with similar dimensions. Anodized cast aluminum Tip has a 1.855" Tip Cup hole, is .905" thick (at hole) and incorporates slots (top & bottom, & vertical) for anti-rotational lock pin. Unit features appropriate clearances for Tip Cup and projects (maximum) 2 3/4" (70mm) from end of spreader tube. Tip Cup hole center is 1.70" (43mm) from tube end. As used on Beneteau First 36.7 & 40.7 (lower spreader), and others. N-171201B
BF-4 Spreader Tip for Tip Cup (Port): BF4-NL528-17-30P: BF-4 Spreader Tip for Tip Cup (Starboard): BF4-NL528-17-30S: Special weld-on BF-4 Spreader Tip has a 2.04" (51mm) hole for Spreader Tip Cup. Designed for Navtec L528C Tip Cups using -17, -22, or -30 VL's and -17 VU's, and Navtec L528D Tip Cups using -22 or -30VL's and -17 VU's, unit is also suitable for other Tip Cups with similar dimensions. Machined from 6061-T6 Aluminum Bar stock, unit has a 2.040" Tip Cup hole, is .870" thick (at hole) and incorporates slot for anti-rotational lock pin on lower side. Unit features appropriate clearances for Tip Cup and projects (maximum) 3 1/16" (77.85mm) from end of spreader tube. Tip Cup hole center is 1.90" (48.25mm) from tube end. As used on Beneteau 42 S7, and others.
BF-4 Spreader Tip for Tip Cup, 2.065": BF4-NL528-D2.065: BF-4 Spreader Tip has a 2.065" (52mm) hole for Spreader Tip Cup. Designed for Navtec L528-17, -22 and -30 Tip Cups, OS standard Tip Cups for -12 to -17VL's, -12 VU's and -10 D's, and others with similar dimensions. Anodized cast aluminum Tip has a 2.065" Tip Cup hole, is .905" thick (at hole) and incorporates vertical slot for anti-rotational lock pin. Unit features appropriate clearances for Tip Cup and projects (maximum) 2 7/8" (73mm) from end of spreader tube. Tip Cup hole center is 1.75" (45mm) from tube end. Item is marked 304277. L528 2.031

Spreader Bases & Components for BF4 Spreaders
Spreader Base Clevis Pin - 12mm: BF4-30: Attaches BF4 Spreader to standard Cast Aluminum Base. SS Clevis Pin is 12mm diameter x 38mm (1 1/2") long.
Old-Style Spreader Base Clevis Pin - 10mm: BF4-30X: Old-Style 10mm Spreader Base Clevis Pins attach BF4 Spreaders with a 10mm pin hole to standard Cast Aluminum Base using special 10mm ID Old-Style Rubber Spreader Base Bushing BF4-31RX, below. SS Clevis Pin is 10mm diameter x 38mm (1 1/2") long.
Spreader Base Bushing, 12mm ID - Rubber: BF4-31R: Black Rubber Bushing fits Cast aluminum BF4 Spreader Bases and is used with 12mm Spreader Base Clevis Pin, BF4-30. Bushing is 20mm (13/16") OD x 21mm long x 12mm ID (7/16"). Rubber version is recommended for greater shock cushioning.
Spreader Base Bushing, 12mm ID - Plastic: BF4-31: New Style Hard white plastic Bushing fits Cast aluminum BF4 Spreader Bases and is used with 12mm Spreader Base Clevis Pin, BF4-30. Bushing is 20mm (13/16") OD x 21mm long x 12mm ID (7/16").
Old Spreader Base Bushing, 10mm ID - Rubber: BF4-31RX: Old-Style Black Rubber Bushing fits Cast aluminum BF4 Spreader Bases, but has a smaller ID for use with Old-Style 10mm Spreader Base Clevis Pin, BF4-30X. Bushing is 20mm (13/16") OD x 21mm long x 10mm (3/8") ID.
Spreader Base for BF-4 Spreader - Port: BF4-35P: Spreader Base for BF-4 Spreader - Starboard: BF4-35S: Unique spreader base design incorporates (2) sockets for use with NG2 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. BF4 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 NG Mast sections.
NG2 Stemball Cup Washer: NG2-CW20: Standard NG2 Stemball Cup Washer is used with swage and mechanical Stemballs in NG2 Mastheads, Spreader Bases and in other applications. Type 316 SS Cup Washer is 34mm (>1 5/16") OD x 20mm (>3/4") ID x 11.5mm (7/16") high.

Spreader Bars & Components for BF4 Spreaders
Aluminum Spreader Bars for BF4 Spreaders have been produced in a variety of configurations, and are sometimes machined for use with a variety of wire and rod Stemballs. They are also available in a variety of lengths and angles not listed here. For items not listed, please specify Mast Section, sweepback angle, and rigging configuration.
BF-4 Rectangular Aluminum Spreader Bar: BF4-40-0: Original Rectangular Aluminum Bar for BF4 Spreaders is 25mm thick x 40mm wide x 15 3/4" (400mm) long, and incorporates a 5� vertical angle for 0� (in-line) Spreaders. Used with NG-46 and larger Mast Sections. Note: Rectangular Spreader Bars are also available in a variety of other configurations. To Order: Specify angle aft, and (for special applications) alternate vertical angles.
*Doubler Plate for BF-4 Rectangular Spreader Bar, NG Masts: BF4-40N:*
Formed Aluminum Doubler Plate is contoured to fit the mast section and reinforces it for use with any size BF4-40 Rectangular Spreader Bar. Plate is (maximum) 5 1/2" (140mm) long x 3" (77mm) high x 4mm thick. Slot in plate is 1 7/8" (47mm) long x 1" (26mm) high. Anodized plates (2 required) are attached to the mast with (6) 3/16" (5mm) rivets. Used with NG-60 through NG-86 Mast Sections. +52432/165248
*Doubler Plate for BF-4 Rectangular Spreader Bar, FM Masts: BF4-40F:*
Formed Aluminum Doubler Plate is contoured to fit the mast section and reinforces it for use with any size BF4-40 Rectangular Spreader Bar. Plate is (maximum) 5 5/8" (144mm) long x 3" (77mm) high x 4mm thick. Slot in plate is 1 7/8" (47mm) long x 1" (26mm) high. Anodized plates (2 required) are attached to the mast with (6) 3/16" (5mm) rivets. For use with FM-385, F-760E and larger FM and F-E Mast sections.

BF-4 Extruded Aluminum Spreader Bar: BF4-41-0: New-style Extruded Aluminum Spreader Bar for BF4 Spreader is (maximum) 27mm (1 1/16") thick x 65mm (2 9/16") wide x 16" (405mm) long, and incorporates a 5� vertical angle for 0� (in-line) Spreaders. Used with NG-46 and larger Mast Sections.
Note: Aluminum Spreader Bars for BF4 Spreaders are also available in a variety of lengths and angles not listed here, and are sometimes machined for use with a variety of wire and rod Stemballs. When inquiring please specify Mast Section, sweepback angle, and rigging configuration. MMW/LOA; A135/385, B160/410, C187/437. 110E-HC

Machined Aluminum Spreader Bar for BF-4 Spreader & F-560E Mast: BF4-42-F560E:
Special Machined Aluminum Spreader Bar for BF4 Spreader is (maximum) 27mm (1 1/16") thick x 65mm (2 9/16") wide x 16" (405mm) long, and incorporates a 5� vertical angle for 30� aft Spreaders. Special Bar has NG1 Stemball seats and removable aft sections (attached with screws) for installation in Furling Mast. As used for lower Spreaders on Jeanneau Sun Odyssey 409 with F-560E Furling Mast Section.
*Doubler Plate for BF4-42-F560E Spreader Bar & F-560E Mast: BF4-40F-SO:*
Special Formed Aluminum Doubler Plate for BF4-42-F560E Spreader Bar and F-560E Mast Section. Plate is as BF4-40F, above, but Slot in plate is 2 5/8" (66mm) long x 1" (26mm) high. As used for lower Spreaders on Jeanneau Sun Odyssey 409 with F-560E Furling Mast Section.

**BF-4 SS Spreader Bar (FM385): BF4-43-111: BF-4 SS Spreader Bar (FM460, NG37, IM-260): BF4-43-115: BF-4 SS Spreader Bar (FM580): BF4-43-121.5: BF-4 SS Spreader Bar (FM740, F-760E, S622): BF4-43-128.5: BF-4 SS Spreader Bar (F-980E, S830): BF4-43-140: BF-4 SS Spreader Bar (FM1060, NG70): BF4-43-144: BF-4 SS Spreader Bar (FM1395, NG80): BF4-43-156: BF-4 SS Spreader Bar (NG86): BF4-43-171.5: BF-4 SS Spreader Bar (FM2390, NG105): BF4-43-182: Cast SS Spreader Bar for BF4 Spreader incorporates seats for NG1 wire or rod Stemballs and is suitable for Spreaders angled up to 25� aft. SS Spreader Bar is (maximum) 1 3/8" (35mm) high x 3 5/8" (93mm) fore & aft, and incorporates a 5 degree vertical angle. This item requires a contoured cut-out in the Mast wall, and is available in a variety of lengths for use with different Mast Sections. Standard sizes (lengths) are listed above, and denote the Mast width that these Bars are used with. Most units are marked with that length (length between the edges of the large holes nearest the Mast). Used with Mast Sections up to FM-1060 and NG-105.** Attaches to Spreaders using standard Spreader Base Clevis Pins, BF4-30, above. To order: Specify Bar length, Bar size (as marked), or Mast Section. Please Note: This item is also available on a Custom basis in lengths for non-standard Mast Sections, Please specify.
*Doubler Plate for BF-4 SS Spreader Bar: BF4-43F:* Formed Aluminum Doubler Plate is contoured to fit the mast section and reinforces it for use with any size BF4-43 SS Spreader Bar. Plate is (maximum) 5 5/8" (144mm) long x 3" (77mm) high. Slot in plate is (maximum) 3 5/8" (93mm) long x 1 3/8" (35mm) high. Plates (2 required) are attached to the mast with (6) 3/16" (5mm) rivets. For use with FM-385, F-760E and larger FM and F-E Mast sections.

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