Kenyon B Boom Section

Kenyon Spars B-Section Boom Measurements (outside): 2.75" x 1.75" (70mm x 44mm) Wall Thickness: .095" Weight/ft.: .89 lbs. Moments of inertia: Ixx = .55", Iyy = .27" Circumference: 7 3/16" Sail slides: 1/2" round slugs (A018, A118) or 1/2" boltrope Alloy: 6063-T6 Standard Boom Lengths: 8', 10'1", 11', 14',
Common Boom usage: AMF Apollo; Bayliner BU 180, 210; Bristol 19; Comet; DN Iceboat; Flying Scot; Gale Force 20; *Harpoon 4.6;** Hood 21; Howmar 12; Interclub Dingy; Malibu 18; Mobjack; NA 21; O'Day 15, 19, 22, Sprite, Javelin, Daysailer, Tempest, Mariner; Pearson Hawk; PY 23; San Juan 21; Tech Dingy; Vanguard 15; Watkins 17; See Also: Kenyon Spars B-Section Mast*

Kenyon B-Section Boom Tube B-Section Boom Tube - Clear Anodized: K-BCA-___: Kenyon B-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 B-Section Boom Assemblies If you require a complete Boom Assembly, select from components below and contact us with specifications. Standard and Roller Reefing Boom Kits are listed below.

Kenyon B-Section Boom Kits Kenyon B-Section Booms are available in Kit form. Kits include all hardware, fasteners, and instructions required to assemble a B-Section Boom, except the Boom Tube. Tools required include a drill, 10-24 and 1/4-20 taps, common screw drivers and a basic understanding of measuring, drilling and tapping. For most Booms drilling holes, and tapping some of them, are all the machining that is required to complete assembly. This is the least expensive and most expedient way to get a new Boom.
B-Section Boom Kit - Standard: K-BBK-1S: Kenyon B-Section Standard Boom Kit comes complete with all hardware required to assemble a B-Section Standard Boom, except the Boom Tube. Kit includes: Gooseneck with Toggle (but without Slide or Mast Bracket), K-84598W; Outhaul Assembly with 2 Tangs, K-B444-2; 3" Cleat for Outhaul line, K-1617; all the fasteners required, and instructions. Order B-Section Boom Tube separately (specify finish and length), if additional parts (Gooseneck Slide, vang bail, 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 a basic understanding of measuring, drilling and tapping.
B-Section Boom Kit - Roller Reefing: K-BBK-1RR: Kenyon B-Section Roller Reefing Boom Kit comes complete with all hardware required to assemble a B-Section Roller Reefing Boom, except the Boom Tube. Kit includes: Roller Reefing Gooseneck with Toggle (but without Slide or Mast Bracket), K-40216RR; Outhaul Assembly with 2 Tangs, K-B444-2; 3" Cleat for Outhaul line, K-1617; all the fasteners required, and instructions. Order B-Section Boom Tube separately (specify finish and length), if additional parts (Gooseneck Slide, vang bail, 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 a basic understanding of measuring, drilling and tapping.

Kenyon B-Section Boom Hardware Listed below are parts specific to the Kenyon B-Section Boom. For more generic parts, see categories listed under Kenyon Spar Parts. There are many parts for specific configurations that are not listed here. If you require B-Section Boom Components not listed here please contact us with details. All Aluminum Castings listed below are carefully hand finished and coated with a baked-on Black Epoxy (to retard corrosion) as Standard. Castings are available Clear Anodized at additional cost, add CA to part number.

B-Section Gooseneck Assemblies & Parts

*B-Section Gooseneck Assembly w/ 3/8" Slide: K-84598:* Cast aluminum boom end fitting includes captive SS tack pin and SS yoke, *K-79, 3/4" SS Toggle, K-9267, and SS Gooseneck Slide, K-9138A.* Fits all mast sections using 1/2" or larger round slugs or boltrope.
	*B-Section Gooseneck Assembly w/ 3/4" Toggle: K-84598W:* As *K-84598* (above), but without SS Gooseneck Slide, K-9138. Toggle attaches directly to any of the Kenyon gooseneck brackets designed for a 3/4" toggle (see individual mast sections), as well as the *K-9138A*, and other gooseneck slides designed for 3/4" toggles.
B-Section Roller-Reefing Gooseneck Ass'y w/ 3/8" Slide: K-40216RR: Spring-loaded roller-reefing mechanism works by pulling aft on the boom and turning it in 1/2 turn increments. SS yoke assembly is fixed in a rectangular recess until boom is pulled aft. SS Spring locks yoke into recess when boom is released. Works only with end-boom sheeting systems with swiveling mainsheet and topping lift attachments. Cast aluminum boom end fitting includes captive SS tack pin and SS roller-reefing yoke assembly, *K-8700A, with 3/4" SS Toggle, K-9267, and SS gooseneck Slide, K-9138A.* Fits all mast sections using 1/2" or larger round slugs or boltrope.
	*B-Section Roller-Reefing Gooseneck Assembly w/ 3/4" Toggle: K-40216RRW:*
	As *K-40216RR* (above), but without SS Gooseneck slide, K-9138A. Toggle attaches directly to any of the Kenyon gooseneck brackets designed for a 3/4" toggle (see individual mast sections), as well as the *K-9138A*, and other gooseneck slides.
	B-Section Gooseneck Casting w/ Tack Pin: K-B333A: Black Epoxy coated Gooseneck casting with captive SS tack pin has 3/8" hole centered in 1" x 3/4" recess for attachment of *K-79* or K8700A SS yoke assemblies for 3/4" toggle. Casting with tack pin only, as used in the assemblies listed above. p
	SS Yoke Assembly for 3/4" Toggle: K-79A: SS yoke attaches to B-Section Gooseneck Casting with Tack Pin *K-B333A, above, using a 1/4" bolt, locknut, and 1" OD washer. Yoke is formed from 5/8" wide stock and is 1" wide (outside), and 13/16" wide (inside), 1/4" hole centers are 11/16" from bottom inside. 3/4" SS Toggle, K-9267*, is attached with a 1/4" SS bolt and locknut (included).
	SS Roller-Reefing Yoke Ass'y for 3/4" Toggle: K-8700A: SS spring-loaded roller-reefing yoke assembly for use with boom end castings that have a 3/8" hole centered in a 1" x 3/4" rectangular recess. Attaches to 3/4" SS Toggle, *K-9267*, with a 1/4" SS bolt and locknut (included). Post is 3/8" diameter x 3" long. Includes SS Spring, (2) SS washers, and cotter pin.
	SS Gooseneck Toggle - 3/4": K-9267: SS Gooseneck Toggle attaches directly to any of the Kenyon gooseneck brackets or gooseneck slides designed for a 3/4" toggle, and to any boom end casting using the *K-79* or K8700A SS yoke assemblies. Toggle is 3/4" square x 7/8" long with 1/4" holes at 90 degrees to each other on 3/8" centers.
	SS Gooseneck Slide - 3/4" for Boltrope: K-9138A: SS Gooseneck Slide fits any gooseneck assembly using the standard 3/4" toggle, *K-9267*, with a 1/4" SS clevis pin (included). Slide has heavy welded SS ring for downhaul attachment. Fits all mast sections using 1/2" or larger round slugs or boltrope.
*B-Section Gooseneck Assembly w/ 3-position Tack & Toggle: K-11238:* Cast aluminum boom end fitting includes 1" SS yoke, *K-80, with 1" SS Toggle, K-1993, and SS 3-position tack bracket, K-8950A, with 5/16" clevis pin. Toggle attaches directly to any of the Kenyon Gooseneck brackets designed for a 1" Toggle (see individual mast sections), and all Kenyon Gooseneck Slides designed for a 1" Toggle (below). Shown with K-1685A* Slide (order separately).
*B-Section Gooseneck Assembly w/ 3-position Tack, Toggle & 2 Reef Hooks: K-43107:*
Cast aluminum boom end fitting includes 1" SS yoke, *K-80, with 1" SS Toggle, K-1993, and SS 3-position tack bracket with 2 SS reef hooks, K-10501, and 5/16" clevis pin for Tack. Toggle attaches directly to any of the Kenyon Gooseneck brackets designed for a 1" Toggle (see individual mast sections), and all Kenyon Gooseneck Slides designed for a 1" Toggle (below). As K-11238* (above), but with reef hooks.
	*B-Section Gooseneck Assembly for Jib Club: K-10330-1:* Cast aluminum boom end fitting for club and staysail booms includes 1" SS yoke, *K-80, with 1" SS Toggle, K-1993.* Commonly used with club pedestals and loose-footed jibs where the tack is secured by means of a pennant attached to the base of the stay.
	*B-Section Gooseneck Casting - No Tack: K-11238C:* Cast aluminum boom end fitting for club, staysail and other booms using separate tack fittings. Used with 1" SS yoke, *K-80, and 1" SS Toggle, K-1993.* Casting has 3/8" hole for attachment of SS yoke, recessed in 1 1/4" square hole.
	SS Yoke Assembly for 1" Toggle: K-80A: SS yoke attaches to various boom end castings with a 3/8" bolt, and to the 1" SS Toggle, *K-1993*, with a 1/4" SS bolt and locknut (included). Yoke is formed from 1" wide stock and is 1 3/16" wide (outside), and 1 1/32" wide (inside), 1/4" hole centers are 13/16" from bottom inside.
	SS Gooseneck Toggle - 1": K-1993: SS Gooseneck Toggle attaches directly to any of the Kenyon gooseneck brackets or gooseneck slides designed for a 1" toggle, and to any boom end casting using the *K-80* SS yoke assembly. Toggle is 1" square x 1 1/8" long with 1/4" holes at 90 degrees to each other on 1/2" centers.
*B-Section Gooseneck Ass'y for Loose-footed Main: K-10634:* Cast aluminum boom end fitting for booms with loose-footed sails includes 1" SS yoke, *K-80, with 1" SS Toggle, K-1993.* Toggle attaches directly to any of the Kenyon Gooseneck brackets designed for a 1" Toggle (see individual mast sections), and all Kenyon Gooseneck Slides designed for a 1" Toggle (below). Unit has no provision for tack and is commonly used with loose-footed sails with a floating tack. As used on Interclub.
SS Gooseneck Slide - 1" for Large Boltrope: K-1685A: SS Gooseneck Slide fits any gooseneck assembly using the standard 1" Toggle, *K-1993*, with a 1/4" bolt and locknut (included). Slide has heavy welded SS ring for downhaul attachment. Slide is 3" long x 1" wide (maximum). Fits B, D, E, 3049, 3650 and all mast sections using 1/2" round slugs or boltrope.
SS Gooseneck Slide - 1" for Small Boltrope: K-10331A: SS Gooseneck Slide fits any gooseneck assembly using the standard 1" Toggle, *K-1993*, with a 1/4" bolt and locknut (included). Slide has heavy welded SS ring for downhaul attachment. Slide is 2 1/2" long x 1" wide (maximum). Fits A, C-1, C-6, 2331, MORC and other mast sections that can accommodate only 3/8" round slugs or boltrope.
SS Gooseneck Slide - 1" for 7/8" Flat Track: K-1686A: SS Gooseneck Slide fits any gooseneck assembly using the standard 1" toggle, *K-1993*, with a 1/4" bolt and locknut (included). Slide has heavy welded SS ring for downhaul attachment. Slide is 3" long x 1 1/16" wide (maximum). Fits on a 7/8" x 1/8" SS Flat Track.

B-Section Outhaul Assemblies & Parts
B-Section Outhaul Casting: K-B444: Heavy-duty Black Epoxy coated cast aluminum Outhaul End has tab with 2 holes for outhaul, and/or topping lift attachment. p
B-Section Outhaul Ass'y w/ Tang: K-B444-1: Cast aluminum boom end fitting has tab with 2 holes for outhaul, and/or topping lift attachment. Includes swiveling tang for mainsheet or topping lift attachment. Swiveling attachments for mainsheet and topping lift are required for use with roller-reefing goosenecks.
B-Section Outhaul Ass'y w/ 2 Tangs: K-B444-2: Cast aluminum boom end fitting has tab with 2 holes for outhaul, and/or topping lift attachment. Includes 2 swiveling tangs for mainsheet and topping lift attachment. Swiveling attachments for mainsheet and topping lift are required for use with roller-reefing goosenecks.
	*Mainsheet Tang for B-Section Boom: SP-260:* Flat Mainsheet Tang attaches to Boom end casting using a 3/8" bolt. For use with Spartan CD-1, Kenyon B-Section, and similar sized booms. Mainsheet Tang is 3 1/2" long x 1" wide x .076" thick with (1) 3/8" mounting hole and (1) 5/8" hole for attachment of Mainsheet block. Hole centers are 2 1/2" apart. Sch 85-70
B-Section 'Fine-Tune' Outhaul Assembly: K-11164: Special 'Fine-Tune' Outhaul Assembly for B-Section Boom with no end cap. Assembly features Cast aluminum slide with internal thread, Delrin bushing which fits in B-Section luff groove, and a 2 1/2" SS screw for precise adjustment of outhaul tension. Unit provides 1 1/2" (maximum) adjustment, a longer screw (1/4-20) can be used for greater adjustment. As used on DN Iceboat.

B-Section Boom Accessories
Outhaul Slides A variety of Outhaul Slides are available to fit the 1/2" Boltrope groove in the B-Section Boom. See Outhaul Slides for 1/2" Boltrope Groove.
*Boom Bail - 1/2" Strap x 2 1/2" long: K-291A:* SS Boom Bail is a lightweight formed-strap design, which can be easily contoured to fit a variety of smaller sections. Bail is 1/2" wide x 1/16" thick, and 2 1/2" long. Fastens with (4) 3/16" (#10) fasteners.
*Boom Bail - 1/2" Strap x 3 1/2" long: K-291B:* SS Boom Bail is a lightweight formed-strap design, which can be easily contoured to fit a variety of smaller sections. Bail is 1/2" wide x 1/16" thick, and 3 1/2" long. Fastens with (4) 3/16" (#10) fasteners.
*Boom Bail - 1/4" x 1 3/4" wide: K-S9001:* SS Boom Bail made from 1/2" x 1/16" strap is designed to be attached with (1) 1/4" SS bolt and nut. Formed at 1 3/4" wide, width can be varied to fit larger or smaller sections. Bail length, from bolt center, is 2 1/2". For use with B-Section boom.
	*Boom Bail Bolt Ass'y - 1/4" for B-Section Boom: K-S9001BA:* Boom Bail bolt assembly includes 1/4" SS bolt x 2 1/4", with locknut, and nylon washers to prevent bail from damaging boom surface as it pivots.
Boom Bail - Internal: K-11364: Internally mounted bail has a 1/4" SS bail welded to a plate formed to fit the *inside* of the boom. Unit is mounted inside the boom, where bail protrudes through a 1" x 1/4" slot, and is held in place with (2) 3/16" SS rivets on 1 7/8" centers. Curved plate measures 2 1/4" long x 3/4" wide. For use with D-Section and smaller Booms.
Boom Vang Ball Attachment Plate for B-Section Boom: K-2182: Formed SS plate for attachment of Boom Vang with 1/8" wire swage ball. Allows for quick attachment and removal of Boom Vang, raised channel design allows easy installation without milling slot in boom. Channel projects approximately 3/8" from underside of Boom when installed. Formed Stainless Steel plate is 2" long x 1 7/8" high. Fastens with (6) 3/16" (#10) screws or rivets.
	Boom Vang Wire Pennant w/ Swage Ball: K-2182WP: Wire Pennant for attachment of Boom Vang to Boom Vang Ball Attachment Plate. Pennant is 1/8" wire with swage ball and shank (MS20664-4) on one end and a nicopress and thimble on the other. Thimble allows attachment of any upper Vang block. Assembly is 6" long. Ball is suitable for all Ball Attachment Plates with a slot that is 1/4" wide or less.
*Spar Cleat - 3 1/4" long: K-1617:* Cast Aluminum Spar Cleat is a low-profile design with a narrow base suitable for use with line up to 1/4" diameter. Black Epoxy Cleat is 3 1/4" long, and fastens to spar with (2) 5/32" (#8) FH screws on 13/16" centers. See also, other Kenyon Spar Cleats.
*Spar Cleat - 4" long: D-10324:* Cast Aluminum Open Base Spar Cleat is a low-profile design with a narrow base suitable for use with line up to 3/8" diameter. Black Epoxy Cleat is 4" long, and fastens to spar with (2) 3/16" (#10) FH screws on 1" centers. See also, other Kenyon Spar Cleats.
*Clam Cleat w/ Fairlead & Curved Base: K-9115X:* Clam Cleat with fairlead is used in place of standard Spar Cleat for frequent Outhaul adjustment in racing applications. Best mounted forward of an eyestrap (K-226) with small block (Har 082, or equivalent). Suitable for use with 1/8"-1/4" (3-6mm) line, black plastic unit fastens with (2) #8 x 3/4" FH Screws on 2 5/8" (66mm) centers. Unit measures 3 1/4" long x 11/16" wide (82x18mm). CL203 CC Jr.
*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 is used on smaller Kenyon Booms for Outhaul and Reef lines. 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.

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Spars, Rigging, and Hardware for Sailboats