Kenyon 4477 HP Mast Section


4477 Standard Mast Hardware Listed below are parts specific to the Kenyon 4477 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 4477 Mast Components not listed here please contact us with details.

Mastheads Kenyon High Performance Sections normally use welded-in mastheads for maximum strength with minimum weight. A variety of masthead configurations are available with a new spar or a replacement tube.
Masthead Sheave Pin: K-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 Pin: 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).
Masthead Sheave Pin: K-11129-3: 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 3/4" long (P208-121).
Masthead Sheave Pin: K-11129-5: 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 5 3/4" long (P208-185).

Spreaders The Kenyon 4477 High Performance Mast Section normally uses Kenyon 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 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-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 4066, 4270, and 4477 Sections.

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.

4270 / 4477 Gooseneck / Vang Bracket w/ Bail: K-11486: 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 3 3/4" wide and attaches to the mast with (8) 1/4" fasteners. Can also be used as Vang Bracket with addition of appropriate Vang Toggle, below.
	Gooseneck Clevis Pin - 3/8": K-CP6-76: Vertical Clevis Pin for use with *K-11486* Gooseneck/Vang Brackets. 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-11486 gooseneck bracket, 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 Toggle: K-10963: Used with the K-11486 Gooseneck Bracket, 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-11486* 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 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.

Mast Boot for 4477 Deck Collar: K-11601B: 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 4477 Mast and K-11601-1 Standard Deck Collar.
	*4477 Mast Boot Clamp: MBC 16-26:* All Stainless Steel Clamp for use with any Mast Boot on Kenyon 4477 Mast. 12
	*4477 Deck Collar Boot Clamp: MBC 21-31:* All Stainless Steel Clamp for use with Mast Boots on all Kenyon 4477 Deck Collars. 15	V
*4477 Deck Collar, Standard: K-11601-1:* Standard, Low-profile 4477 Deck Collar fastens to deck with (8) 5/16" bolts or screws. Base size (max.) is 12 3/8" x 9" 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 4477 Deck Collar: K-77509-22: 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 4477 Deck Collar, K-11601-1.

Electrical Access Plate: RR-72-99: This 4 1/2" x 2" SS plate 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. Attaches with (4) 1/4-20 RH machine screws (included) and saves much in frustration and money by allowing access to the electrical plugs above the mast step without having to unstep the mast.

Mast Step Casting: K-11453: Mast Step for Kenyon 4477 fastens with (4) 3/8" bolts in internal adjustment slots to allow for precise positioning. Unit is (maximum) 7 7/8" long x 4 1/2" wide x 1 7/8" high. Cast in 356 Aluminum with black epoxy finish.
Mast Step Base Plate Adapter: K-11824: 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 4477 mast step, K-11453. Allows for precise positioning without un-stepping the mast. Anodized aluminum plate is 3/8" thick, and measures 10 1/2" long x 6" wide. Fastens to keelson with (4) 3/8" bolts in Slots that allow for 1 1/4" adjustment. Slot centers are 4 3/4" athwartships, and 8 1/8" fore & aft.

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Spars, Rigging, and Hardware for Sailboats

Kenyon Spars K-4477 High Performance Section Measurements (outside): 7.70" x 4.40" (196mm x 112mm) Wall Thickness: .150"-.300" Weight/ft.: 4.20 lbs. Moments of inertia: Ixx = 25.60", Iyy = 9.30" Circumference: 20 3/8" Alloy: 6061-T6 Sail slides: 3/8" round slugs (A017, A117) or 3/8" boltrope Common Mast usage: Black Watch 37; Morgan 36;

Kenyon 4477 Mast Section 4477 Mast Section - Clear Anodized: K-X4477CA-___: 4477 Mast Section - Raw: K-X4477R-___: Kenyon 4477 Section Mast Tube is stocked in a variety of lengths (listed above) fully anodized or raw (mill finish), it can also be cut to shorter lengths. To order, specify length. Sections can also be milled for the sailgate or other components, painted finishes and other lengths are available on special order, Please specify. If you require a complete Mast Assembly, you can select from components below and contact us with specifications.