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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 Spars 3756 Boom Section


Kenyon Spars 3756 Boom
Measurements (outside): 6.00" x 3.75" (152mm x 95mm)
Wall Thickness: .130"
Weight/ft.: 2.4 lbs.
Moments of inertia: Ixx = 8.3", Iyy = 3.6"
Circumference: 15 13/16"
Sail slides: 3/4" flat slides (A006M)
Alloy: 6061-T6
Standard Boom Lengths: 11', 16'6"

Kenyon 3756 Boom Section

Common Boom usage: Alden 44; Alejuela 38; Cabo Rico 38*; Cal 35, 39; Endeavour 40, 42*, 43K Main; Ericson 34, 35, 38, 38-200; Hans Christian 38, 43K Main; Horizon 39K Main; Hunter 54; J/36*; Lancer 36, 37; Lord Nelson 35; Passport 40; Roberts 43K Main; S-2 11.0*; Stamas 44K Main; Tartan 41; US-35, US-42;
See Also: Kenyon Spars 3756 Mast

Kenyon 3756 Boom Section

3756 Boom Section - Clear Anodized: K-X3756CA-___:
Kenyon 3756 Section Boom Tube is stocked in a variety of lengths (listed above) fully anodized, it can also be cut to shorter lengths. To order: specify length.
Sections can also be milled for the sail entrance or other components if necessary, painted finishes and other lengths are available on special order, Please specify. If you require a complete Boom Assembly, you can select from components below and contact us with specifications.

 

Kenyon 3756 Boom Kit - Internal Outhaul & Reef Lines

3756 Boom Kit - Internal Lines: K-3756BK-2:
Kenyon 3756 Internal Boom Kit comes complete with all hardware required to assemble a 3756 Boom with an Internal 4-1 outhaul purchase and 2 Internal Reef Lines, except the Boom Tube, and Reef lines.
Kit includes: Gooseneck with sheaves and cams (without Toggle), K-43002; Outhaul Assembly with 3 sheaves, K-11472M; (1) Boom Bail, K-11325; 4-1 Outhaul Tackle with Clew Shackle, K-90231M; 4" Cleat for Outhaul line, D-10324; all the fasteners required and instructions.
Order 3756 Boom Tube separately (specify finish and length). If additional parts (Toggle, bails, etc.) are required, they must be ordered separately. All components are detailed below. Tools required include a drill, 10-24 and 1/4-20 taps, common screw drivers and wrenches, and a basic understanding of measuring, drilling and tapping. An 1/8" Nicopress Tool is also required to finish the Outhaul wire.

 

E,3550,3756_boom

Kenyon 3756 Boom Hardware
Listed below are parts specific to the Kenyon 3756 Boom Section. For more generic parts, see Kenyon Exit Plates and other categories listed under Kenyon Spar Parts. There are many parts for specific configurations that are not listed here. If you require 3756 Boom Components not listed here please contact us with details.

3756 Internal Gooseneck Assemblies

3756 4-Sheave Gooseneck Assemblies

3756 Outhaul Assembly

3756 Standard Boom Accessories
 


3756 Internal Gooseneck Assemblies
Kenyon Internal Gooseneck Assemblies allow easy control of up to three internal lines. An outhaul on the bottom centerline which is led to a cleat on the underside of the boom, and one or two reef lines which can be cleated with integral friction-lock lever-action cams, or led to the deck and cleated aft.
Note: Kenyon Internal Gooseneck Assemblies are now equipped with the new friction-lock lever-action cams for greater holding ability, and SS cover plates to keep the reef lines captive at all times. Old-Style units featured Spring Cams (with or w/o handles), and different reef sheaves than the improved version. The Old-Style units are easily identified by the absence of the SS cover plates. While upgrading to the improved style using one of the K-11443 Conversion Kits (below) is recommended, original parts for the Old-Style gooseneck are still available. See Parts for 3756 Old-Style Internal Gooseneck.

 

3756 Internal Gooseneck Ass'y w/ Toggle/Tack fitting: K-43002A:
Cast aluminum gooseneck assembly incorporates provisions for internal outhaul and 2 internal reef lines. Outhaul line exits through aluminum sheave on centerline and runs along boom bottom to a cleat. Reef lines exit port and starboard running past lever action cams, over delrin sheaves, and down. SS cover plates keep lines on sheaves at all times. Includes SS combination Toggle/Tack/Reef Hook Assembly, K-10345A. Toggle attaches to any Kenyon gooseneck bracket designed for 1 1/2" toggle and 3/8" vertical pin. Vertical pin, K-CP6-76, is not included. See Parts for 3756 Internal Gooseneck Assembly.

 

K-43002A

3756 Internal Gooseneck Ass'y: K-43002:
As K-43002A, above, but without SS combination toggle/ tack/reef hook assembly, K-10345A. See Parts for 3756 Internal Gooseneck Assembly.

 

K-43002

3756 Internal Gooseneck Ass'y w/o Cams: K-43002NC:
As K-43002, above, but with SS spacers in place of the reef cams. For use where reef lines are led down to the deck and cleated aft on the cabin top. See Parts for 3756 Internal Gooseneck Assembly.

 

3756 Internal Gooseneck Ass'y for Outhaul: K-43002-1:
As K-43002, above, but with outhaul sheave only, and no provisions for reef lines. See Parts for 3756 Internal Gooseneck Assembly.

 


Gooseneck Toggle/Tack Ass'y w/ Reef Hooks: K-10345A:
Used with the Kenyon E-section, 3550, and 3756 internal goosenecks, this combination Toggle/Tack/Reef Hook Assembly features 3 tack positions and includes 3/8" tack fastpin, K-10557. Takes 3/8" vertical and horizontal pins. Two 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, K-CP6-76.

 

K-10345A

 

Tack Fastpin for 1 1/2" Toggle: K-10557 (FP-6-32):
SS Fastpin is 3/8" diameter x 1" long. Used in 1 1/2" Toggle/Tack/Reef Hook Assembly K-10345A.

 

3/8" Vertical Gooseneck Pin for 1 1/2" Toggle: K-CP6-76:
SS Clevis pin is 3/8" diameter x 2 3/8" long. Used with E-section, 3550, and 3756 internal booms, to attach the K-10345A Toggle/Tack/Reef Hook Assembly to the Gooseneck Bracket on the mast.

 

Long Gooseneck Toggle/Tack Ass'y w/ Reef Hooks: K-10345AL:
As K-10345A, above, but modified to increase the Tack Setback by 1". Greater clearance at the vertical Pin also allows for use with some Aluminum Gooseneck Brackets and Slides not compatible with the standard unit. Used with the Kenyon E-section, 3350, 3550, and 3756 Internal Goosenecks, this combination Toggle/Tack/Reef Hook Assembly features 3 tack positions and includes 3/8" tack fastpin, K-10557. Takes 3/8" vertical pin 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 2" between vertical and horizontal pin centers. Unit (excluding Reef Hooks) is 4" high x 7/8" wide x 3 1/4" long. Toggle fits all Kenyon Mast Brackets and a variety of Gooseneck Slides designed for a 1 1/2" Toggle with a 3/8" vertical pin.

 

K-10345AL 

 


New-Style Double Reef Cam Conversion Kit for 3756: K-11443:
Cam Conversion Kit for 3756 Gooseneck converts Old-Style Spring-Cam arrangement to the New-Style friction cam assembly. Easily installed Kit includes everything necessary for 2 reef lines including Cam levers, adjustable friction washers, reef sheaves, SS spacers, Cover plates, bolts and locknuts. No machining is required. Individual components are listed separately, See Parts for 3756 Internal Gooseneck Assembly.

 

K-11443
New-Style Port Reef Cam Conversion Kit for 3756: K-11443P:
New-Style Starboard Reef Cam Conversion Kit for 3756: K-11443S:

Single Cam Conversion Kit for 3756 Gooseneck converts Old-Style Spring-Cam arrangement to the New-Style friction cam assembly. Easily installed Kit includes everything necessary for single reef line including Cam lever, adjustable friction washers, reef sheave, SS spacer, Cover plate, bolts and locknuts. No machining is required. Specify Port or Starboard. Individual components are listed separately, See Parts for 3756 Internal Gooseneck Assembly.
New-Style Sheave Conversion Kit for 3756: K-11443NC:
Sheave Conversion Kit for 3756 Gooseneck converts Old-Style Gooseneck to the New-Style with Cover Plates, Sheaves, and No cams. Easily installed Kit includes everything necessary for leading reef lines down and aft, including (2) reef sheaves, (4) SS spacers, Port and Starboard Cover plates, bolts and locknuts. No machining is required. Individual components are listed separately, See Parts for 3756 Internal Gooseneck Assembly.  As K-11443, above, but with 2 SS Spacers to replace the reef cams. This Kit converts any 3756 Internal Reefing Gooseneck (Old or New-Style, but not the 4-sheave Gooseneck Assembly) to the K-43002NC Gooseneck Assembly, above.

 

SS Gooseneck Slide for 1 1/4" x 3/16" Flat Track & 1 1/2" Toggle: K-10430M:
Special SS Gooseneck Slide specially designed for use with Kenyon K-10345-series Gooseneck Toggle/Tack Assemblies. Slide fits 1 1/4" x 3/16" SS Flat Track (and Kenyon 1 1/4" Gooseneck Track, as well as standard 1 1/4" aluminum T-Track). SS Gooseneck Slide is 4" high x (maximum) 1 1/2" wide and fits most 1 1/2" Toggles using a 3/8" vertical pin or bolt. Slide has heavy welded SS ring for attachment of downhaul line or shackle. *

 


3756   4-Sheave Gooseneck Assemblies
3756  4-Sheave Gooseneck Ass'y w/ Toggle/Tack fitting: K-11284A:
Heavy-duty cast aluminum gooseneck assembly incorporates provisions for 4 internal lines. Two horizontally mounted sheaves on each side allow internal outhaul, topping lift, and reef lines to be led aft to winches or cleats on the side of the boom. Nylon sheaves handle up to 7/16" line. Includes SS combination Toggle/Tack/Reef Hook Assembly K-10345A. Toggle attaches to any Kenyon gooseneck bracket designed for 1 1/2" toggle and 3/8" vertical pin. Vertical pin, K-CP6-76, is not included. Unit has same length and cutback dimensions as standard K-43002 3-Sheave Gooseneck Assembly, above. See Parts for 3756 4-Sheave Internal Gooseneck Assembly.

 

 

 

3756  4-Sheave Internal Gooseneck Assembly: K-11284:
As K-11284A, above, but without SS combination Toggle/Tack/Reef Hook Assembly, K-10345A. See Parts for 3756 4-Sheave Internal Gooseneck Assembly.

 


3756 Outhaul Assemblies
3756 Internal Outhaul Assembly: K-11472M:
Cast aluminum boom end fitting has centerline aluminum sheave for up to 3/16" wire or 3/8" line, and (2) 1 7/8" nylon sheaves for up to 7/16" reef lines. Includes 3/8" clevis pin for topping lift attachment. New-style fitting requires no tube cutting to mount. Unit extends 3 1/8" (maximum) aft of the boom tube. Parts for 3756 Internal Outhaul Assembly.

 

mmm
3756 Internal Outhaul Ass'y for Cut-away Boom: K-43003:
Lightweight cast aluminum 3-sheave boom end fits in boom end with upper end cut-out and lower angled cut-away for minimum weight. Includes centerline aluminum outhaul sheave for up to 3/16" wire or 3/8" line, and (2) 1 7/8" nylon sheaves for up to 7/16" reef lines. Includes 3/8" clevis pin for topping lift attachment. Lightweight end fitting requires tube cutouts (top and bottom) to mount. See Parts for 3756 Cut-away Outhaul Assembly.

 

K-43003

3756 Internal Outhaul Tackle, 4-1: K-90231M:
Internal Outhaul Tackle for use with 3756 Boom provides a 4-1 purchase. Block and Tackle assembly includes 25' of 5/16" line and 13' of 1/8" wire spliced to the Blocks. Becket block attaches to bolt at forward end of boom, line exits through centerline Gooseneck sheave, wire exits through centerline sheave in outhaul assembly. Wire length is suitable for longest standard length boom, but must be cut shorter in most applications. Includes fiddle block, single block w/ becket, spliced line, wire, and loose captive-pin Clew shackle w/ thimble & nicopress. An 1/8" Nicopress Tool is required for installation. 05

 

 

 

 


3756 Standard Boom Accessories
Boom Bail - 3/8" x 4" wide: K-11325:
Heavy SS Boom Bail made from 3/8" rod is designed to be attached with (1) 3/8" SS bolt and nut. Formed at 4" wide, width can be varied to fit larger or smaller sections. Bail length, from bolt center, is 5". For use with 3756 boom.

 

Boom Bail Bolt Assembly - 3/8" for 3756 Boom: K-11325BA:
Boom Bail bolt assembly includes 3/8" SS bolt x 4 3/4", with locknut and nylon washers to prevent bail from damaging boom surface as it pivots.

 

Internal Boom Bail: K-11428:
Heavy 5/16" SS bail is welded to a SS plate formed to fit the inside of the boom. Unit is mounted inside the boom, where bail protrudes through a 5/16" x 1 1/2" slot, and is held in place with (2) 3/16" SS rivets on 3 1/4" centers. Curved plate measures 4" long x 1 3/8" wide.

 

K-11428

Heavy-duty Weld-in Vang Tab: K-11700L:
Heavy-duty Aluminum Boom Vang Attachment Lug is welded into the Boom for attachment of Solid (hard) Vangs and Struts with a 1/2" Pin. Vang Lug slides into Boom, drops through a 1/2" wide x 8" long slot, and is welded in place from the outside. Lug is much longer than slot it fits in to provide stiffening and reinforcement in this high-stress area. Vang Lug is cut from 6061-T6 Plate and is (maximum) 10 1/2" long x 1/2" wide x 2 7/8" high, Lug projects approximately 1 7/8" from underside of Boom when installed. In addition to 1/2" attachment hole, a 3/8" hole is provided for a shackle to attach a preventer. Fits Most Boom Vangs with a 1/2" Pin.

 

K-11700L

 

 


Winch Pad for 3756: K-10641:
Black Urethane Winch Pad is 4" diameter, and molded to fit on centerline of 3756 section. Pad insulates winch from spar wall and properly seats it for mounting. Pad is attached to boom with 1 screw, clearance holes for screws to mount winch are then drilled through pad, winch mounting holes are drilled and tapped in spar wall.

 

K-10641

Stainless Steel Winch Pad: K-1139:
Stainless Steel winch plate is contoured to fit on centerline of 3756 Section Boom. Pad insulates winch from spar wall and properly seats it for mounting. Pad is attached to mast with (1) 3/16" (#10) FH machine screw, clearance holes for screws to mount winch are then drilled through pad, winch mounting holes are drilled and tapped in spar wall. SS plate is 3 3/8" high x 3 3/8" wide x .072" thick. SM D83905

 

Spar Cleat - 4" long: Ken D-10324:
Cast Aluminum Spar Cleat is a low-profile design with a narrow base suitable for use with line up to 3/8" diameter. Commonly used for Outhaul Line. Black Epoxy coated Cleat is 4" long, and fastens to spar with (2) 3/16" (#10) FH screws on 1 3/16" centers. See also, other Kenyon Spar Cleats.

 

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.

 

SS Eyestrap: K-226:
Small Stainless Steel Eyestrap is used for securing smaller items to boom. Attaches to Boom with (2) 3/16" (#10, 5mm) screws or rivets.

 

Cheek Block w/ Curved Base: K-140X:
Cheek Block with curved base to fit Kenyon 3756 Boom is used for topping lift. SS Cheek Block has 1 1/16" OD Delrin Sheave suitable for use with line up to 3/8" diameter. Base is 3 3/16" long x 7/8" wide, and fastens to spar with (4) 3/16" (#10) RH screws on 2 11/16" (horizontal) and 1/2" (vertical) centers.

 

Outhaul Slide Assembly for 3/4" Internal Track: K-43009:
Outhaul Slide Assembly features pivoting toggle with 2-position clew attachment using 5/16" clevis pin, and separate pin for attachment of outhaul pennant. Slide is (maximum) 3 3/4" long x 3/4" wide, and 3 1/4" high. For 3550, 3756 and other Boom sections with 3/4" Internal Track. Also, see other Outhaul Slide Assemblies for 3/4" Internal Track Booms.

K-43009


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