Kenyon 4066 HP Mast Section

Masthead Assembly for Masthead Rig: K-11347-2: Double channel extruded aluminum Masthead Assembly for 4066 mast section incorporates (4) 2 1/2" dia. aluminum sheaves, K-198-10A, for internal or external wire or rope halyards. Includes 3/8" pins for attachment of slotted SS Toggles for headstay and backstay (order separately), and 1/4" topping lift pin. Masthead fits in 3" x 1 5/8" wide slot cut into fore and aft sides of the mast tube. Pre-drilled for attachment of Spinnaker Halyard Bail K-10454 (order separately). Masthead is 12 1/4" long x (maximum) 4 1/2" wide, and attaches to the mast with (2) 3/8" bolts. -1w/sh a
	Masthead Toggle w/ 3/8" Pin: K-10511: Slotted SS Toggle Assembly for K-11347 Masthead includes 3/8" lower pin, and is designed to sit on 3/8" upper pin. Toggle measures 1 1/8" wide x 2" between pin centers, and will accommodate eyes up to 7/16" thick.
	Masthead Toggle w/ 7/16" Pin: K-10511-1: Slotted SS Toggle Assembly for K-11347 Masthead includes 7/16" lower pin, and is designed to sit on 3/8" upper pin. Toggle measures 1 1/8" wide x 2" between pin centers, and will accommodate eyes up to 7/16" thick.
	Masthead Toggle w/ 1/2" Pin: K-10511-2: Slotted SS Toggle Assembly for K-11347 Masthead includes 1/2" lower pin, and is designed to sit on 3/8" upper pin. Toggle measures 1 1/8" wide x 2" between pin centers, and will accommodate eyes up to 7/16" thick.
	Masthead Spinnaker Bail: K-10454: SS 5/16" bail is welded to a Trapezoidal SS plate which bolts to the top of the masthead with (3) 1/4" x 3/4" screws and locknuts. Trapezoidal plate measures 2" long x 2 7/8" (maximum) wide. Aft screw holes are on 2" centers, Bail is angled downward and projects 1 3/4" forward of plate. Mounting requires drilling (3) 1/4" holes. Designed for use with *K-11347* Masthead Assembly. Attaches with (3) 1/4" x 3/4" screws and locknuts.
	Port Offset - Masthead Spinnaker Bail: K-10454P: As K-10454 (above), but with bail offset to Port side to reduce interference of Spinnaker halyard block with Headstay.
	Starboard Offset - Masthead Spinnaker Bail: K-10454S: As K-10454 (above), but with bail offset to Starboard side to reduce interference of Spinnaker halyard block with Headstay.
Trisect Masthead Ass'y for 4066 Tapered Mast: K-11782A: Weld-in Trisect Triple channel Masthead Assembly for tapered 4066 mast section incorporates (4) aluminum sheaves for internal main and (3) forward halyards. Dedicated main and jib halyards are on centerline, with 2 wing halyards offset P and S. Assembly includes (4) 2 1/2" OD sheaves, K-198-10AB6, (2) 3/8" Axle/Sheave Pins, K-10680-1, (1) 3/8" Axle/Sheave Pin, K-10680 (wing sheaves), 1/4" topping lift pin, and 1/2" pins for attachment of Backstay and for Headstay Toggle, *K-11537* (order separately). Welded aluminum Masthead is (maximum) 12" long x 7 1/2" high x 4 1/8" wide. Designed for use with Masthead Chafe Cage and Roller components listed below (order separately). Masthead is designed to be welded into the mast Section and is unfinished. As used on J/33, Olson 911S (w/ FM195 Mast). Tto4 1/2"
	Masthead Chafe Cage for 4066 Trisect Head: K-11783: Stainless Steel Chafe Cage Assembly for *K-11782A* Masthead Assembly encloses centerline halyard and protects wing halyards from the headstay attachment point. Lightweight welded Chafe Cage attaches to Mast with (3) #10 (3/16") screws.
	Masthead Chafe Roller Ass'y for Wing Halyards: K-11784A: Stainless Steel Tube with 2 delrin Bushings, K-11785, is used on K-11782A Masthead Assembly to protect wing halyards on the outboard side. Assembly is 3 1/2" long x 3/4" OD x 1/4" ID. Two units required per Masthead.
		Masthead Chafe Roller Tube: K-11784: Stainless Steel Tube is the central part of K-11782A Masthead Chafe Roller Assembly. SS Tube is 3/4" OD x 9/16" ID x 3 1/4" long.
		Delrin Bushing for Masthead Chafe Roller: K-11785: Delrin Bushing is used on both ends of SS Tube (*K-11784), in K-11784A* Masthead Chafe Roller Assembly. Turned Bushing is 3/4" OD x 1/4" ID x 1/2" long, and fits a 9/16" ID Tube.
	Masthead Chafe Roller Base - Port: K-11786P: Masthead Chafe Roller Base - Starboard: K-11786S: Stainless Steel Roller Base attaches to Mast with (2) 1/4" (6mm) FH screws and has 1/4" axle for wing halyard Chafe Roller Assembly, K-11784A. One pair each (P&S) required for use with *K-11782A* Trisect Masthead Assembly.
	Masthead Toggle Ass'y for Trisect Head w/ 1/2" Pin: K-11537: Heavy SS Eye/Jaw Toggle Assembly for Trisect Masthead includes 1/2" lower pin, and is designed to sit on 1/2" upper pin. Toggle is formed from 3/16" stock, and measures 1/2" wide (at top) x 1 1/4" wide (at bottom) x 2 3/4" between pin centers. Will accommodate eyes up to 1/2" thick.
*Masthead Sheave Axle w/ Tab - 3/8" x 3": K-10680:* SS Masthead Axle/Sheave Pin has thin stem welded to tab which attaches to mast with (1) #10 screw. Pin measures 3/8" x 3" long.
*Masthead Sheave Axle w/ Tab - 3/8" x 2 1/2": K-10680-1:* SS Masthead Axle/Sheave Pin has thin stem welded to tab which attaches to mast with (1) #10 screw. Pin measures 3/8" x 2 1/2" long.
Masthead Sheave Axle w/ Tab - 1/2" x 3": 11129-1: SS Masthead Axle/Sheave Pin has thin stem welded to teardrop tab which attaches to mast with (1) #10 screw. Pin measures 1/2" x 3" long (P208-97).
Masthead Sheave Axle w/ Tab - 1/2" x 3 1/2": K-11129-2: SS Masthead Axle/Sheave Pin has thin stem welded to teardrop tab which attaches to mast with (1) #10 screw. Pin measures 1/2" x 3 1/2" long (P208-113).

*Aluminum Jib Box Ass'y w/ 3/8" Pin: K-11597-1:* Cast aluminum four (4) halyard internal Jib Box Assembly with 3/8" pin and 3/8" Forestay Toggle. Accommodates two spinnaker halyards over two jib halyards, in a trim, narrow and lightweight unit. Features heavy-duty Nylatron Sheaves: (2) 2" Sheaves for Spinnaker Halyards, K-11594; (1) 2" Sheave for Upper Jib Halyard, K-11640; (1) 1 3/4" Sheave for Lower Jib Halyard, K-11639; and (2) 5/8" secondary Sheaves (forward) for the 2 Upper Halyards, K-11585. Jib Halyard Sheaves are suitable for use with wire or rope halyards. All Sheaves are 1/2" wide for snag free handling of halyards up to 3/8" diameter. Assembly fits in mast cutout 9 3/4" high x 1" wide, and fastens with (4) 1/4"-20 machine screws (included). Internal mounting flange is slightly curved to fit a variety of masts. Assembly is designed to fit through the mounting slot and is then fastened from the outside. Forged Chrome Bronze Toggle, MER 5770-412, is included. Unit measures 12 7/8" long x 1" wide and projects 2" (maximum) inside of mast. Suitable for use with a variety of mast sections on boats with forestays up to 1/4" dia. As used on J/30, J/29F and others. A2-4, 4-5
*Aluminum Jib Box Ass'y w/ 1/2" Pin: K-11597-2:* Cast aluminum four halyard internal Jib Box Assembly with 1/2" pin and 1/2" Forestay Toggle (MER 5770-416). As K-11597-1, above, but with 1/2" Pin. As used on Pearson Flyer and others. DC
*SS Jib Box Ass'y w/ 3/8" or 1/2" Pin: K-10658X:* Welded SS four (4) halyard internal Jib Box Assembly with 3/8", or 1/2" pin for Forestay Toggle. Accommodates two spinnaker halyards over two jib halyards. This heavy Jib Box was used on a variety of MORC boats including many of the J/30's and J/29F's. Assembly fits in mast cutout 9 3/8" high x 13/16" wide, and projects 2" inside of mast. Mounting flange is fastened to the Mast with (12) 1/4" fasteners. This part is discontinued, having been replaced by the much lighter K-11597-1, above. A sheave and bushing replacement kit, K-10658SK, is available, see below. Please note: When replacing this item with the new K-11597-1 (the mast cutout needs to be widened and extended downward), the Forestay pin will be 1" higher on the mast; the forestay length will change accordingly. A7-4
	*SS Jib Box Sheave Replacement Kit: K-10658SK:* Sheave Replacement package for K-10658 Welded SS Jib Box Assembly includes all (7) Aluminum sheaves and (4) Bronze bushings. Includes (1) 2" Sheave for Upper Spinnaker Halyard, K-198-8A; (3) 1 3/4" Sheaves for Lower Spinnaker Halyard and both Jib Halyards, K-198-7A; (3) 1" secondary Sheaves for the 3 Upper Halyards, K-198-4A; (4) 3/8" OD x 1/4" ID bushings, K-9523, for the 4 Primary Sheaves; and (6) Sheave Axle rivets.

Spreaders The Kenyon 4066 High Performance Mast Section normally uses Kenyon SP-3, and SP-4 airfoil spreaders with thru-bar spreader systems. These systems have been proven through many years of top-level racing, and are now the norm on most racing yachts. Standard (0 degree) bars for Kenyon SP Spreader sections are listed below. Other angles and styles are available. For Spreader details, or to order replacement Spreaders, see Kenyon Spreader Sections.
Spreader Bar for SP-3 Spreader - 0 degree aft: K-11295: Stainless Steel Bar assembly is used with Kenyon SP-3 Spreaders for rigs with in-line spreaders. Installed through a 3/16" x 2 1/4" slot in the mast, the bar is held in place with roll pins (included) on each side. Holes (1/4") for spreader attachment and roll pins (1/8") are pre-drilled. Unit is 10" long x 2 1/4" wide, and has a 5-degree vertical angle. Fits 4060 and 4066 Sections.
*Spreader Bar for SP3 Spreader - 3� aft: K-11295-3:* Stainless Steel Bar assembly is used with Kenyon SP3 Spreaders for rigs with spreaders at 3� aft. Installed through a 3/16" x 2 1/4" slot in the mast, the bar is held in place with roll pins (included) on each side. Holes (1/4") for spreader attachment are pre-drilled, holes for roll pins (1/8") are pre-drilled for 4" wide Mast Sections, for other Mast Sections new roll pin holes can be drilled, or unit can be used without. Unit is 10" long x 2 1/4" wide, and has a 5-degree vertical angle. Used with 4060 and 4066 Mast Sections. Special as used on Ericson 28 Mk. 2 and others.
Spreader Bar for SP-4 Spreader - 0 degree aft: K-11521: Stainless Steel Bar assembly is used with Kenyon SP-4 Spreaders for rigs with in-line spreaders. Installed through a slot in the mast, the bar is held in place with roll pins (included) on each side. Holes (5/16") for spreader attachment and roll pins (1/8") are pre-drilled. Unit is 12 1/4" long x 3 3/16" wide, and has a 5-degree vertical angle. Fits 4060, 4066, 4270, and 4477 Sections.

Spar Cleat - 5" long: Ken D-10325: Cast Aluminum Spar Cleat is a low-profile design with a narrow base suitable for use with line up to 1/2" diameter. Black Epoxy coated Cleat is 5" long, and fastens to spar with (2) 7/32" (#12) FH screws on 1 1/2" centers. See also, other Kenyon Spar Cleats.

Sail Slide Stop: K-11198: Sail Slide Stop works to keep sail slides from coming out of the sail entrance when the mainsail is lowered. Aluminum Slide Stop is 7/16" diameter x 1" long with SS thumb screw, thumb screw features captive nylon washer to prevent damage to mast surface.
Sailgate Slide Conversion Kit for 3" Gate: K-11672K: Kenyon High Performance Sections are normally used with mainsails having a rope luff for quick hoisting. It is sometimes desirable to switch to a mainsail with slugs for ease of handling. This kit contains 2 specially contoured SS plates & 4 SS thumbscrews, K-45, to close up the standard 3" gate cutout and still allow the slides to go by without jamming. Plates measure 1" wide x 2 3/4" high with 2 horizontal slots on 2" centers. Mounting requires drilling and tapping 4 holes (#10-32).
Sailgate Slide Conversion Kit for 4" Gate: K-11673K: Kenyon High Performance Sections are normally used with mainsails having a rope luff for quick hoisting. It is sometimes desirable to switch to a mainsail with slugs for ease of handling. This kit contains (2) specially contoured SS plates & (4) SS thumbscrews, K-45, to close up the standard 4" gate cutout and still allow the slides to go by without jamming. Plates measure 1 1/4" wide x 3 3/4" high with 2 horizontal slots on 3" centers. Mounting requires drilling and tapping 4 holes (#10-32).
Sailgate Slide Conversion Kit for 6" Gate: K-11754K: Kenyon High Performance Sections are normally used with mainsails having a rope luff for quick hoisting. It is sometimes desirable to switch to a mainsail with slugs for ease of handling. This kit contains (2) specially contoured SS plates & (6) SS thumbscrews, K-45, to close up the standard 6" gate cutout and still allow the slides to go by without jamming. Plates measure 1 1/4" wide x 5 3/4" high with 3 horizontal slots on 2 1/2" centers. Mounting requires drilling and tapping 6 holes (#10-32).
	Stainless Steel Thumb Screw: K-45: SS Thumbscrew for use with Kenyon Mainsail Gates. SS Thumbscrew has a 10-32 thread and is 1/2" long (under head).
Roller Prefeeder: K-11087: Heavy-duty SS Roller Prefeeder automatically feeds boltrope mainsails into mast. Large diameter rollers eliminate friction and chafe. Supplied with threaded slug and screws to clamp it in luff groove, below sail entrance. Adjust higher or lower until feeding is perfect. Fits any mast section that uses boltrope.

Gooseneck Bracket for 3/8" Pin: K-10650: Designed for use with the *K-10345* gooseneck toggle/tack assembly, this SS welded bracket takes a 3/8" vertical pin and has clearance for a 1 1/2" toggle. Base is 5" vertical x approximately 3" wide, and attaches to the mast with (8) 1/4" fasteners. Also be used as a Vang Bracket with addition of appropriate Vang Toggle, below.
Gooseneck Bracket w/ Bail for 3/8" Pin: K-11361: Designed for use with the *K-10345* gooseneck toggle/tack assembly, this SS welded bracket takes a 3/8" vertical pin and has clearance for a 1 1/2" toggle. Base is 5" vertical x approximately 3" wide, and attaches to the mast with (8) 1/4" fasteners. Also be used as a Vang Bracket with addition of appropriate Vang Toggle, below. Identical to *K-10650* (above), but with welded 5/16" bail for mainsheet turning block.
	*Vertical Gooseneck Clevis Pin - 3/8": K-CP6-76:* Vertical Clevis Pin for use with K-10650 and K-11361 Gooseneck/Vang Bracket. SS pin is 3/8" diameter with 2 3/8" grip length.
	Gooseneck Toggle/Tack Ass'y w/ Reef Hooks: K-10345A: Used with the K-10650 and K-11361 gooseneck brackets, this combination Toggle/Tack/Reef Hook Assembly features 3 tack positions and includes 3/8" tack fastpin (*K-10557). Takes 3/8" vertical pin* (K-CP6-76), and 3/8" horizontal pin. Two 5/16" reef hooks allow for ease of reefing from either side of the boom. Toggle portion is 1 1/2" high x 7/8" wide with 1" between pin centers. Unit (excluding Reef Hooks) is 4" high x 7/8" wide x 2 1/4" long. Attaches directly to any of the Kenyon SS Gooseneck Brackets designed for a 1 1/2" Toggle with 3/8" vertical pin. Fits E section, 3550, and 3756 standard boom goosenecks.
	Tack Fastpin for 1 1/2" Toggle: K-10557 (FP-6-32): SS Fastpin is 3/8" dia. x 1" long. Used in 1 1/2" Toggle/Tack/Reef Hook Assembly K-10345.

Vang Bracket for 3/8" Pin: K-10650: This SS welded unit is suitable for use as a Vang or Gooseneck Bracket. Bracket uses a 3/8" vertical pin, K-CP6-76, below, and has clearance for a 1 1/2" toggle. Base is 5" vertical x approximately 3" wide, and attaches to the Mast with (8) 1/4" fasteners. Use with any Vang Toggle, listed below.
	*Vertical Gooseneck Clevis Pin - 3/8": K-CP6-76:* Vertical Clevis Pin for use with K-10650 and K-11361 Gooseneck/Vang Bracket. SS pin is 3/8" diameter with 2 3/8" grip length.
	Vang Toggle: K-10963: Used with the K-10650 or K-11361 Gooseneck Brackets, this SS toggle results in a fully pivoting vang bracket to minimize working stresses. Large 3/4" horizontal hole allows for attachment of any shackle or block.
	*Vang Toggle w/ 14mm Pin hole: K-10963-2:* Welded SS Vang Toggle for use with any Kenyon Gooseneck Bracket with a 3/8" Pin. SS tube is 1 1/2" long with Bronze bushed hole for 3/8" Vertical Pin. Welded SS Tab is 5mm (3/16") thick and projects 2 3/8" (60mm) out from tube. Tab has 14mm (9/16") hole for attachment of Vang and 8mm (5/16") hole for attachment of Vang Tackle. As used with Sparcraft Pneuvang and others.
	*Vang Toggle for Hard Vang: K-11788:* Used with the K-10650 or K-11361 and other Kenyon Gooseneck Brackets with a 3/8" Pin, this SS toggle has (1) 9/16" (14mm) hole for Vang attachment and (3) 5/16" (8mm) holes for blocks. As used with Sparcraft Pneuvang and others.
Vang Bracket, non-pivoting: K-10654: Formed base plate has welded vertical triangle (non-pivoting) with 3/4" diameter hole for attachment of vang tackle block. Attaches to the mast with (8) 1/4" fasteners.
Vang Bracket: K-10654SK: Formed base plate has heavy-duty welded rod loop for attachment of vang tackle block. Attaches to the mast with (6) 1/4" fasteners.
Vang Toggle for Rigid Vang – Special: A variety of semi-custom Toggles, or Bracket/Toggle combinations are available to fit rigid (or solid) vangs produced by a number of manufacturers. Please specify manufacturer, model and Pin size.

Halyard Turning Block Assembly: K-10865: Mast mounted Halyard Turning Block is attached to Mast at Deck level to allow halyards to be led aft. Swiveling Halyard Turning Block adjusts to any angle and features 2" Aluminum V-groove Sheave, K-10861-B5, for use with wire or rope Halyards up to 7/16" diameter. Investment Cast Almag Block attaches to mast with (4) 1/4" FH screws or rivets. Base is 4 1/16" high x 1 7/8" wide.

Mast Boot for 4066 Deck Collar: K-11600B: White PVC Mast Boot helps prevent leakage at the deck. Slid over mast prior to stepping, it is then secured with a hose clamp on the deck collar and one around the mast. One piece molded construction for optimum fit. Unit fits 4066 Mast and K-11600 Standard Deck Collar.
	*4066 Mast Boot Clamp: MBC 12-22:* All Stainless Steel Clamp for use with any Mast Boot on Kenyon 4066 Mast. 10
	*4066 Deck Collar Boot Clamp: MBC 16-26:* All Stainless Steel Clamp for use with Mast Boots on all Kenyon 4066 Deck Collars. 12		V
*4066 Deck Collar, Standard: K-11600:* Deck Collar for 4066 Mast Section fastens to deck with (6) 5/16" bolts or screws. Base size (maximum) is 11 1/4" x 8 1/2" x 1" high, with 1/4" thick flanges. Cast in 356 Aluminum with clear anodized finish. For use with standard Kenyon Mast Wedge K-77509.
Mast Wedge for 4066 Deck Collar: K-77509-19: Extruded rubber Mast Wedge with flange provides even loading all around the mast. One-piece construction is far superior to individual wedges, which cause point loading leading to deformation. Cut to length for use with Standard 4066 Deck Collar, K-11600.

Electrical Access Plate: RR-72-99: Electrical Access Plate is designed to allow access to internal electrical plugs above the mast step, without having to unstep the mast. Saves much in frustration and money by allowing you to check mast wiring connections with the mast up. SS Plate is 4 1/2" x 2" and is designed to cover a 3" x 1 1/4" vertical slot in the side of the mast, just above the top of the mast step. Plate is slightly curved to fit a variety of mast sections and attaches with (4) 1/4-20 RH machine screws (included).

4066 Mast Step: K-11451: Mast Step for Kenyon 4066 Mast Section fastens with (4) 3/8" bolts in internal adjustment slots to allow for precise positioning. Unit is (maximum) 6 3/4" long x 4 1/8" wide x 1 3/4" high. Cast in 356 Aluminum with black epoxy finish.
Mast Step Base Plate Adapter: K-11780: Mast Step Base Plate Adapter converts standard mast step for use with external adjustment screws, on keel-stepped rigs. Fastens with (4) 3/8" FH screws in internal adjustment slots of 4066 mast step, K-11451. Allows for precise positioning without un-stepping the mast. Anodized aluminum plate is 5/16" thick, and measures 9 1/4" long x 5 1/2" wide. Fastens to keelson with (4) 3/8" bolts in Slots that allow for 1 1/8" adjustment. Slot centers are 4 1/4" athwartships, and 7" fore & aft. As used on J/33.

Kenyon Spars K-4066 High Performance Section Measurements (outside): 6.60" x 4.00" (168mm x 102mm) Wall Thickness: .130"-.250" Weight/ft.: 3.10 lbs. Moments of inertia: Ixx = 14.30", Iyy = 5.60" Circumference: 17 7/8" Sail slides: 3/8" round slugs (A017, A117) or 3/8" boltrope Alloy: 6061-T6 Standard lengths: 40', 48'8" Common Mast usage: Ericson 28+, 28 Mk.2; J/33; Common Boom usage:* C&C 44; J/40;

Kenyon 4066 Mast Section Kenyon 4066 High Performance Section is currently out of production. If you require a new mast tube, please contact us with details for recommendations on the most suitable replacements, for most boats it would be the Kenyon 4270 Mast Section.

4066 Standard Mast Hardware Listed below are parts specific to the Kenyon 4066 Mast Section. For more generic parts, see Kenyon Exit Blocks, Kenyon Exit Plates, Kenyon Shroud Tangs, and other categories listed under Kenyon Spar Parts. There are many parts for specific configurations that are not listed here. If you require 4066 Mast Components not listed here please contact us with details.

Mastheads Listed below are standard Mastheads for rigs using the Kenyon 4066 High Performance Mast Section, and parts for others. Fractional and tapered masts normally use welded-in mastheads for maximum strength with minimum weight. A variety Custom mastheads are available as well, please inquire.

Your cart

Spars, Rigging, and Hardware for Sailboats