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Spars, Rigging, and Hardware for Sailboats

Rig-Rite, Inc.
Phone: (001) 401-739-1140 -- FAX: (001) 401-739-1149
www.RigRite.com          Ordering/Questions

Kenyon 4780 High Performance Section


Kenyon Spars K-4780 High Performance Section
Measurements (outside): 8.00" x 4.70" (203mm x 120mm)
Wall Thickness: .157"-.380"
Weight/ft.: 4.60 lbs.
Moments of inertia: Ixx = 32.40", Iyy = 11.40"
Circumference: 21 5/16"
Alloy:  6061-T6
Sail slides: 3/8" round slugs (A017, A117) or 3/8" boltrope
Common Mast usage: Frers 36; J/40; Morgan 36**;
Kenyon 4780 Mast Section

Kenyon 4780 Mast Section

4780 Mast Section - Clear Anodized: K-X4780CA-___:
4780 Mast Section - Raw: K-X4780R-___:
Kenyon 4780 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.
 


4780 Standard Mast Hardware
Listed below are parts specific to the Kenyon 4780 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 4780 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.
Bisect Masthead Assembly for 4780 Tapered Mast: K-11741:
Bisect Double channel Masthead Assembly is welded in 4780 Tapered mast section and incorporates (4) 3" dia. aluminum sheaves, K-11520, for internal wing halyards using wire or rope. Central plate has 5/8" holes for Headstay and Backstay Toggle attachment. Strong, low-windage design features dual Spinnaker Bails, K-11302.  As used on J/40.   Tto "

 

 

3" Aluminum Sheave w/ Integral Bronze Bushing - 5/8" wide, 1/2" ID: K-11520:
Anodized Aluminum Sheave with integral Oilite Bronze bushing. Sheave is 3" OD x 5/8" (.625") wide x 1/2" ID. With wire/rope V-groove.

 

3" Aluminum Sheave - HL Teflon Bushing & Ball Bearing: Har 691:
Anodized Aluminum Sheave with High Load Bushing & Ball Bearing construction. High Load Sheaves have ball bearings for side loads only, and a Teflon Composite bushing for maximum radial loads. Harken "Hi-load" Sheave is 3" OD x 5/8" wide x 1/2" ID, and mounts on a single 1/2" axle. Special Narrow Sheave with wire/rope V-groove, for line up to 3/8" diameter and wire up to 3/16". Breaking Strength is 16,500 lbs.. Unit has SS hub.

 

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).

 

K-11129-1
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).

 

K-11129-2
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).

 

K-11129-3
Masthead Spinnaker Bail: K-11302:
Heavy 3/8" SS bail is welded to a flat plate which bolts to the top of the masthead with (4) 5/16" x 3/4" screws and locknuts. Plate measures 2 1/4" long x 2 5/8" wide. Screw hole spacing (to centers) is 13/16" fore and aft x 1 1/8" wide. Bail is angled downward and projects 1 3/4" forward of plate. Mounting requires drilling (4) 5/16" holes. As used with Masthead Assemblies on Kenyon 4780, 5280 and 6092 Mast Sections. As used on J/40. 

 


Spreaders
The Kenyon 4780 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-11521L:
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 13 1/4" long x 3 3/16" wide, and has a 5-degree vertical angle. Fits 4780, 4984, and 5591 Sections.

 

K-11521L

 

Aluminum Spreader Bar for SP4 Spreader - Special: K-11701:
Special Extruded Aluminum Bar is used with Kenyon SP4 Spreaders for rigs with swept-back spreaders of various angles. Holes (3/8") for spreader attachment are pre-drilled. Unit is 13 5/8" long x 1 15/16" wide x 1/2" thick, and has a 5-degree vertical angle. Fits 4780 and 4984 Sections. As used on J/40.

 


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).

 

K-11672K

 

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.

 


4780 / 4984 Gooseneck / Vang Bracket w/ Bail: K-11542:
Designed for use with the K-10345 Gooseneck Toggle/Tack Assembly for E-Section and larger Booms, this SS welded Bracket takes a 3/8" Vertical pin, K-CP6-76, and has clearance for a 1 1/2" Toggle. Fastens to 4780 Mast Section with (8) 1/4" (6mm) fasteners and includes welded 5/16" bail for mainsheet turning block. Base is 5" vertical x 4 5/8" wide. 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-11542 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-11542 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.

 

K-10345A

 

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-11542 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.

 

K-10963

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-11542 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.

 


4780 / 4984 Gooseneck Bracket - Heavy Duty: K-11693:
Designed for use with the K-11698 gooseneck toggle, this SS welded bracket takes a 5/8" vertical pin and has clearance for a 2 1/2" Toggle. Base is 5" vertical x 4 5/8" wide. Attaches to the mast with (8) 1/4" fasteners. As used on J/40.

 

Gooseneck Toggle - Heavy Duty: K-11698:
Used with the K-11693 heavy-duty gooseneck bracket, this Solid machined Aluminum Gooseneck Toggle is 2 1/2" high and accommodates 5/8" vertical and 1/2" horizontal pins. White epoxy coated Toggle is 2 1/2" high x 1 1/4" wide x 2 5/8" (maximum) long, pin holes are on 1 1/4" centers. Toggle also fits other gooseneck brackets designed for a 2 1/2" toggle with 5/8" vertical pin. As used on J/40.

 

K-11698
Gooseneck Tack Bracket Assembly: K-2166A:
Used with the K-11693 Gooseneck Bracket and K-11698 Gooseneck Toggle, this Tack Assembly attaches above the gooseneck bracket on the vertical 5/8" gooseneck bolt, and includes 3/8" tack fastpin, K-10410.

 

Gooseneck Tack Bracket Assembly w/ Reef Hooks: K-2166-1A:
Used with the K-11693 Gooseneck Bracket and K-11698 Gooseneck Toggle, this combination Tack and Reef Hook Assembly attaches above the gooseneck bracket on the vertical 5/8" gooseneck bolt, and includes 3/8" tack fastpin, K-10410. Two reef hooks allow for ease of reefing from either side of the boom.

 

K-2166-1A

4780 / 4984 Vang Bracket - Heavy Duty: K-11694:
Designed for use with the K-11695 vang toggle, this SS welded bracket takes a 5/8" vertical pin and has clearance for a 3" Toggle. Base is 5" vertical x 4 5/8" wide. Attaches to the mast with (8) 1/4" fasteners. As used on J/40.

 

Vang Toggle – Heavy Duty: K-11695:
Used with the K-11694 Vang Bracket, this aluminum toggle is 3" high, 1/2" wide at the horizontal pin, and takes 5/8" vertical and horizontal pins. As used on J/40.

 

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 4780 Deck Collar: K-11602B:
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 4780 Mast and K-11602 Standard Deck Collar.

 

4780 Mast Boot Clamp: MBC 16-26:
All Stainless Steel Clamp for use with any Mast Boot on Kenyon 4780 Mast. 12

 

4780 Deck Collar Boot Clamp: MBC 21-31:
All Stainless Steel Clamp for use with Mast Boots on all Kenyon 4780 Deck Collars. 15

 

V
4780 Deck Collar, Standard: K-11602:
Standard, Low-profile 4780 Deck Collar fastens to deck with (8) 5/16" bolts or screws. Base size (maximum) is 12 5/8" x 9 3/8" 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 4780 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 4780 Deck Collar, K-11602.

 

K-77509


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.

 

RR-72-99


Mast Step Casting: K-11454:
Mast Step for Kenyon 4780 fastens with (4) 3/8" bolts in internal adjustment slots to allow for precise positioning. Unit is (maximum) 8 1/4" long x 4 7/8" wide x 1 7/8" high. Cast in 356 Aluminum with black epoxy finish.

K-11454


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