FB-550 Sparcraft Boom

NG1 Gooseneck Bracket for 12mm Pin: NG1-11: Cast aluminum Gooseneck Bracket is used on a variety of of NG and FM Mast Sections. It is compatible with the Gooseneck Toggle, FB2-412, below, used with FB-220 and FB-550 Goosenecks, and with other Gooseneck Assemblies. Bracket is 3 7/8" (98mm) high x 2 3/4" (70mm) wide, and is fastened with four (4) 1/4" (6mm) rivets. Bracket has 12mm (7/16") holes for use with any of the NB1-1 Vertical Gooseneck Toggle Pins or Bolts, below. Note: There are other variations of this Gooseneck Bracket, differing only in width. All use the same Pins and Toggles.
NG1 Wide Gooseneck Bracket for 12mm Pin: NG1-11F:
Cast aluminum Gooseneck Bracket is used on I-265E, I-365E, and F-560E Furling Masts, and a variety of Isomat Masts with FB-550 and smaller Booms. It is compatible with all FB and NB Gooseneck Toggles that use a 12mm Pin. Bracket is 3 7/8" (98mm) high x 3 9/16" (90mm) wide, and is fastened with four (4) 1/4" (6mm) rivets. Bracket has 12mm (7/16") holes for use with any of the NB1-1 Vertical Gooseneck Toggle Pins. *Note that Bracket is commonly drilled for use with six (6) rivets, locating indents are provided.
NG1 Narrow Gooseneck Bracket for 12mm Pin: NG1-11N: Cast aluminum Gooseneck/Vang Bracket is used on a variety of smaller FM Mast Sections. It is compatible with all FB and NB Goosenecks that use a 12mm Pin. Bracket is 3 7/8" (98mm) high x 1 15/16" (49mm) wide, and is fastened with four (4) 1/4" (6mm) rivets. Bracket has 12mm (7/16") holes for use with any of the NB1-1 Vertical Gooseneck Toggle Pins, below. Commonly used with FM-35 thru FM-101 Mast Sections.
	NB1 Gooseneck Pin Ass'y w/ Reef Hooks: NB1-1RA: Stainless Steel Reef Hook/Tack Assembly incorporates 12mm Vertical Gooseneck Bolt with Tack Shackle and dual Reef Hooks. Reef Hooks are formed from 8mm rod, Assembly is (maximum) 3 5/8" wide x 6" high, and includes 5mm SS Tack Shackle. Bolt is 12mm (1/2") diameter x 92mm (3 5/8") long (under head), assembly includes Tack Shackle, washer and 12mm SS Locknut. For use with any of the NG1-11 Gooseneck Brackets and a variety of Gooseneck Toggles for a 12mm Pin.
	NB1 Vertical Gooseneck Pin: NB1-1: Clevis pin is 12mm (7/16") dia. x 85mm (3 3/8") long. Used to attach the Gooseneck Toggle to NG1-11 Gooseneck brackets.
	NB1 Tack Shackle: NB1-2: SS Tack Shackle fits through hole in top of vertical gooseneck clevis pins. Shackle has 5mm (3/16") pin.

NG2 Gooseneck Bracket for 14mm Pin: NG2-12: Cast aluminum Gooseneck Mast Bracket for use with FB550-1 Gooseneck Assemblies fits a variety of NG and FM Mast Sections. Bracket is 4 3/4" (120mm) high x 3 1/2" (90mm) wide, and is fastened with eight (8) 1/4" (6mm) rivets. Bracket has 14mm (9/16") hole on bottom side, and 22mm (7/8") hole at top. Use with any of the FB2-1 Vertical Gooseneck Pins and FB2-412 Gooseneck Toggle, below. SS Bracket Bushing, NG2-13, is required for use with this Gooseneck Bracket.
	NG2 Gooseneck Bracket Bushing: NG2-13: SS Bushing for use with NG2-12 Gooseneck Mast Bracket and FB2-1 Vertical Gooseneck Pins. SS Bushing is 22mm OD x 14mm ID x 15mm long.
FM2 Gooseneck Bracket for 14mm Pin: FM2-11T: Extruded aluminum Gooseneck Mast Bracket for use with FB550-1 Gooseneck Assemblies fits a variety of FM Mast Sections. Bracket is 4 3/8" (112mm) high x 3 1/2" (90mm) wide, and is fastened with eight (8) 3/16" or 1/4" (5 or 6mm) rivets and (2) 1/4" (6mm) FH screws. Bracket has a 14mm (9/16") hole for use with any of the FB2-1 Vertical Gooseneck Pins and FB2-412 Gooseneck Toggle, below. Note: There are other variations of this Gooseneck Bracket, differing only in the Mast Sections that they fit. All use the same Pins and Toggles.
	FB2 Vertical Gooseneck Pin w/ Reef Hooks: FB2-1A: 14mm Vertical Gooseneck Toggle Pin Assembly is used to attach the FB2-412 or FB2-414 Gooseneck Toggles to NG2-12 and FM2-11 Mast Brackets. SS Gooseneck Pin Assembly has (2) integral 10mm Reef Hooks and includes Tack Shackle NB2-2, washer and 14mm SS Locknut. Unit is 14mm (9/16") diameter x 135mm (5 3/8") long (under head).
	FB2 Vertical Gooseneck Pin Ass'y: FB2-1ARA: 14mm Vertical Gooseneck Toggle Pin Assembly is used to attach the FB2-412 or FB2-414 Gooseneck Toggles to NG2-12 and FM2-11 Mast Brackets. SS Gooseneck Pin Assembly includes Tack Shackle NB2-2, washer and 14mm SS Locknut. Unit is 14mm (9/16") diameter x 135mm (5 3/8") long (under head).
	FB2 Vertical Gooseneck Pin: FB2-1BA: 14mm Vertical Gooseneck Toggle Pin only, as used in FB2-1ARA assembly, above. SS Gooseneck Pin is 14mm (9/16") diameter x 135mm (5 3/8") long (under head), and threaded on the bottom.
	FB2 Tack Shackle: NB2-2: SS Tack Shackle fits through hole in top of FB2-1 Vertical Gooseneck Toggle Pins. Shackle has 8mm (5/16") pin, throat width is 22mm (7/8").
	Screw Pin for NB2-2 Tack Shackle: NB2-2SP: Replacement Screw Pin only for NB2-2 Tack Shackle. Screw Pin has 8mm thread.
	FB2 Gooseneck Pin w/ Tack Pin & Loops: FB2-1ARL: 14mm Vertical Gooseneck Toggle Pin Assembly is used to attach the FB2-412 or FB2-414 Gooseneck Toggles to NG2-12 and FM2-11 Mast Brackets. SS Gooseneck Pin Assembly includes welded side loops, 8mm (5/16") Tack Pin, washer and 14mm SS Locknut. Unit is 14mm (9/16") diameter x 135mm (5 3/8") long (under head).

FB-550 Boom Components The FB-550 Boom is commonly used with a variety of FB2, and NB2 components, detailed below. The FB550-1 Gooseneck can be used with 2 different Gooseneck Toggles, detailed below, to allow for connection to two different sizes of Gooseneck Brackets, See: Mast Attachment Components, above.
*FB2 Gooseneck Toggle for 12mm Vertical Pin: FB2-411:* Extruded Aluminum Gooseneck Toggle is used on FB-220 and FB-550 Booms to attach to NG1-11 Gooseneck Brackets, above. Toggle is 1 15/16" (50mm) high x 1 5/8" wide x 2 7/8" long with holes for 12mm vertical and horizontal pins on 1 7/16" centers. Anodized Toggle features central hole for cotter pin to secure Horizontal Pin FB220-1P, or FB550-1P.
FB2 Gooseneck Toggle for 14mm Vertical Pin: FB2-412: FB2 GN Toggle for 14mm Vertical Pin, Black: FB2-412B: Cast Aluminum Gooseneck Toggle is used on FB-550 and other Booms to attach to NG2-12 and FM2-11 Gooseneck Brackets, using any of the FB2-1 Vertical Gooseneck Pins, above. Toggle is 2 3/4" (69mm) high x 1 1/2" (37mm) wide x 3 3/8" (86mm) long, with holes for 14mm vertical and 12mm horizontal pins, on 2" (50mm) centers. Anodized Toggle features central hole for cotter pin to secure Horizontal Pin FB550-1P. Also available in Black, as used on C&C, Tartan and others.

Old-Style FB-550 Gooseneck Ass'y: FB550-1X: Old-Style FB-550 Gooseneck castings are no longer available, replace with FB550-1A Gooseneck Assembly and Toggle FB2-412, below. Other replacement parts are available, See: FB-550 Old-Style Gooseneck Assembly.
*FB-550 Gooseneck w/ Sheaves & Cams: FB550-1AC:* Cast aluminum Gooseneck Assembly incorporates provisions for internal outhaul and 3 internal reef lines. Internal lines run over delrin sheaves, and down past lever action cams. Cams can be removed to allow lines to go straight down to the deck, outboard sheaves can be used to run lines upward for use in Auto-Reef applications. Includes (4) sheaves, NG1-3, and (4) cams, NBA-14. Order Horizontal Gooseneck Pin FB550-1P, and appropriate FB2-4 Toggle, separately.
	FB-550 Gooseneck Ass'y w/ Sheaves only: FB550-1A: As *FB550-1AC, above, but with sheaves only for applications where lines are cleated on deck. Does not* include Cams which can always be added later.
	FB-550 Gooseneck Casting: FB550-1: Clear anodized Replacement Casting only, for any of the FB-550 Gooseneck Assemblies listed above. Casting extends (maximum) 4 7/8" (124mm) forward of the boom tube. Distance from horizontal Pin hole to boom tube is 4 1/16" (103mm).
	FB-550 Horizontal Gooseneck Pin: FB550-1P: Horizontal Gooseneck Pin is used to attach the FB550-1 Gooseneck to FB2-4 Gooseneck Toggles, above. Pin is 12mm (7/16") diameter x 62mm (2 7/16") long, and features central cross hole for attachment to Toggle using a cotter pin (included). b68ml
	FB-550 Horizontal Gooseneck Bolt Ass'y: FB550-1BA: Horizontal Gooseneck Bolt is used to attach the FB550-1 Gooseneck to FB2-4 Gooseneck Toggles, above. This item is sometimes used in place of the FB550-1P, above. Bolt is 12mm (7/16") diameter x 82mm (3 1/4") long, Assembly includes washers and 12mm SS Locknut. b100C
	FB2 Boom Sheave: NG1-3: Acetyl Sheave is 50mm (2") OD x 14mm (9/16") wide x 10mm (3/8") ID.
	FB2 Boom Sheave - Aluminum: NG1-3A: Anodized Aluminum Sheave is 50mm (2") OD x 14mm (9/16") wide x 10mm (3/8") ID, and is much sturdier than the plastic version.
	Sheave Axle Kit for FB-550 Gooseneck: FB550-12K: SS tubular Sheave Axle pin is 10mm (3/8") diameter x 98mm (3 7/8") long, and fits in upper hole inFB550-1 Gooseneck Casting. Tubular Axle Pin is secured with (2) 3/16" large head Aluminum rivets, FB2-1R, included.
	Cam Axle Kit for FB-550 Gooseneck: FB220-12K: SS tubular Cam Axle pin is 10mm (3/8") diameter x 90mm (3 17/32") long, and fits in lower hole in FB550-1 Gooseneck Casting. Tubular Axle Pin is secured with (2) 3/16" large head Aluminum rivets, FB2-1R, included.
	*Gooseneck Cam: NBA-14:* Gooseneck Cam lever used in all FB220 and FB550 goosenecks. Anodized extruded aluminum cam measures (max.) 2 3/4" long x 9/16" wide (70 x 14mm), and rides on 10mm (3/8") cam axle.
	AutoReef Sheave for FB2 Gooseneck: SM25R13-10: Delrin Sheave is 25mm (1") OD x 12mm (7/16") wide x 10mm (3/8") ID. Rollers replace the two outboard Cams in the FB550 Gooseneck for AutoReef applications. NB2-19R

*Spar Cleat – 6 3/8": NGC-6:* Cast Aluminum Cleat is 160mm (6 3/8") long. Other Cleats have also been used on this boom section, and are listed separately. Other Isomat Cleats.
Exit Plate – Large Snap-in: NG2-7: Large Black plastic Snap-in Exit Plate eliminates line chafe, and accommodates a maximum of 5/8" line. Exit Plate measures 4 1/2" x 1 5/16" (115mm x 34mm), and installs in cut-out 1" x 4 1/4" (26mm x 112mm). Other Exit Plates have also been used on this boom section, and are listed separately. Other Isomat Exit Plates.
AutoReef Internal Shuttle Block: NB2-20: Cast aluminum Shuttle Block incorporates 2 Delrin Roller sheaves. Used in AutoReef single line reefing systems.

FB-550 Boom Bails The FB-550 Boom is designed for use with NB2 and FB3 Boom and Vang Bails, detailed below.
NB2 Boom Bail Ass'y: NB2-15A: SS Articulating Boom Bail fits in integral slot in underside of FB-550 and other boom sections. Bail is made from 10mm rod. Formed plate is 3.2mm thick and measures 4 3/4" (120mm) long x 1 3/16" (30mm) wide. Fastens with (2) 1/4" (6mm) rivets.
	NB2 Boom Bail: NB2-15R: SS formed rod bail only, as used in NB2 Boom Bail Assembly NB2-15A, above. Bail is made from 10mm (3/8") rod, and is 2 3/4" (70mm) long x (maximum) 1 15/16" (50mm) high.
	NB2 Boom Bail Plate: NB2-15BP: SS formed plate only, as used in NB2-15A Boom Bail Assemblies. Plate is 3.2mm thick and measures 4 3/4" (120mm) long x 1 3/16" (30mm) wide. Fastens with (2) 1/4" rivets.
NB2 Boom Bail Ass'y - Heavy-duty: NB2-15AW: As NB2-15A (above), but Bail is reinforced with a welded crossbar. This heavy-duty option prevents the bail from compressing in extreme circumstances and is used primarily on larger boats.
	NB2 Heavy-duty Boom Bail: NB2-15RW: SS formed rod Bail only, reinforced with a welded crossbar as used in NB2 Heavy-duty Boom Bail Assembly NB2-15AW, above. Bail is made from 10mm (3/8") rod, and is 2 3/4" (70mm) long x (maximum) 1 15/16" (50mm) high.

*NB2 Boom Vang Lug for 1/2" Pin: NB2-16-12:* SS Boom Vang Attachment Lug fits in integral slot in underside of NB2 and FB2 Boom sections and has 1/2" (12.6mm) hole for attachment of Vangs from a variety of manufacturers. Slide plate (3mm) is 6 1/2" long, and is welded to 5mm (3/16") thick Triangle, hole center is 32mm (1 1/4") from Boom bottom. Unit slides into track and fastens with (4) 1/4" (6mm) rivets. Used with NG1 Isovang, and a variety of others.

*NB2 Boom Vang Lug for 14mm Pin - Pneuvang: NB2-16-14C:*
Heavy-duty Cast SS Boom Vang Attachment Lug fits in integral slot in underside of NB2 and FB2 Boom sections and has 14mm (9/16") hole for attachment of Sparcraft Pneuvang, Size 4 and smaller. Investment Cast SS Vang Attachment Lug is 255mm (10") long x 29mm (maximum) wide, hole center is 38mm (1 1/2") from Boom bottom, Lug is 6.4mm wide at Pin hole. Unit slides into track and fastens with (6) 1/4" (6mm) rivets.
*NB2 Boom Vang Lug for 14mm - Pneuvang #5: NB2-16-145C:*
Heavy-duty Cast SS Boom Vang Attachment Lug fits in integral slot in underside of NB2 and FB2 & FB3 Boom sections and has 14mm (9/16") hole with wide Lug for attachment of Sparcraft Pneuvang, Size 5. Investment Cast SS Vang Attachment Lug is 255mm (10") long x 29mm (maximum) wide, hole center is 38mm (1 1/2") from Boom bottom, Lug is 8mm wide at Pin hole. Unit slides into track and fastens with (6) 1/4" (6mm) rivets.

*NB2 Boom Vang Lug for 5/8" (16mm) Pin: NB2-16-16:* SS Boom Vang Attachment Lug fits in integral slot in underside of NB2 and FB2 & FB3 Boom sections and has 5/8" (16mm) hole for attachment of Vangs from a variety of manufacturers. Slide plate (3mm) is 6 1/2" long, and is welded to 5mm (3/16") thick Triangle, hole center is 32mm (1 1/4") from Boom bottom. Unit slides into track and fastens with (4) 1/4" (6mm) rivets.
*FB3 Boom Vang Lug for 5/8" (16mm) Pin: FB3-16-16:* Heavy-duty SS Boom Vang Attachment Lug has a 5/8" (16mm) hole in a 5mm (3/16") thick triangle welded *through* 5mm slide plate specially milled to fit integral slot in underside of NB2 and FB2 & FB3 Boom sections. Unit is 10" (255mm) long x 1 3/16" (30mm) wide, hole center is 32mm (1 1/4") from Boom bottom. Lug slides into track and fastens with (6) 1/4" (6mm) rivets. As used with Sparcraft Pneuvang and others.

*NB2 Boom Vang Lug for 22mm (7/8") Pin: FB3-16C-22:* Heavy-duty Cast SS Boom Vang Attachment Lug fits in integral slot in underside of NB2 and FB2 & FB3 Boom sections and has 22mm (7/8") hole for attachment of NG2 Isovang. Investment Cast SS Vang Attachment Lug is 255mm (10") long x 29mm (maximum) wide, hole center is 65mm (2 1/2") from Boom bottom. Unit slides into track and fastens with (6) 1/4" (6mm) rivets. Longer, stronger Cast unit replaces earlier welded version, NB2-16-22.

Outhaul Cars Sparcraft Booms sometimes use an Outhaul Car that fits in its' integral Track, listed below. Note that Booms used with Furling Masts sometimes use upgraded Outhaul Systems with special Track and Ball-bearing Outhaul Cars, See: Sparcraft Booms for Furling Masts.
NB2 Outhaul Car: NB2-18A: SS Outhaul Car Assembly is 92mm (3 5/8") long. Car rides on 4 delrin wheels and features a 12mm (7/16") clew attachment pin and a 10mm (3/8") pin for attachment of the outhaul pennant.
	NB2 Outhaul Car Wheel: NB2-18W: Delrin Wheel for NB2 Outhaul Car is 19mm (3/4") OD x 10mm (3/8") wide x 10mm (3/8") ID.
	NB2 Outhaul Car Axle: NB2-18X: SS Outhaul Car Axle is 10mm (3/8") OD x 24mm (15/16") long.

FB2 Outhaul Car, Short: FB2-18AS: Aluminum Outhaul Car Assembly is 100mm (4") long. Car rides on 4 Torlon rods to minimize friction, and features a 8mm (5/16") removable shackle for attachment of the clew and outhaul pennant.
	Torlon Rods for FB2 Short Outhaul Car: FB2-18ASR: Torlon Rod Set for Short FB2 Outhaul Car includes (4) 6.5mm Torlon rods x 100mm (4") long.
FB2 Outhaul Car, Short - Double: FB2-18ASD: Heavy-duty Outhaul Car Assembly is 230mm (9") long. Car consists of (2) FB2-18AS Short Outhaul Cars, above, joined with a SS coupler, and features a 16mm (5/8") Pin for attachment of the clew and an 14mm (9/16") Pin for attachment of the outhaul pennant.
	FB2 Short Outhaul Car Coupler: FB2-18DC: Heavy-duty SS Coupler Assembly is used to connect two FB2-18AS Outhaul Cars, above, for high load applications. SS Coupler Assembly attaches to Car shackles with 12mm (7/16") Pins, and features a 16mm (5/8") Pin for attachment of the clew and a 14mm (9/16") Pin for attachment of the outhaul pennant. Heavy-duty welded SS Channel is made from 5mm stock and is 230mm (9") long x 36mm (1 7/16") wide.
FB2 Outhaul Car, Long: FB2-18AL: Aluminum Outhaul Car Assembly is 150mm (6") long. Car rides on 4 Torlon rods to minimize friction, and features a 8mm (5/16") shackle for attachment of the clew and outhaul pennant. This item is no longer available and is shown here for identification only.
	Torlon Rods for FB2 Long Outhaul Car: FB2-18ALR: Torlon Rod Set for Long FB-2 Outhaul Car includes (4) 6.5mm Torlon rods x 150mm (6") long.

FB-550 Outhaul Ass'y Complete: FB550-2A: Cast aluminum Outhaul Assembly incorporates provisions for internal outhaul and 3 internal reef lines. Sheaves and sheave axle slide in from the aft side simultaneously, and are held in place by the outhaul and/or reef lines. Center tab on aft upper side has 6mm (1/4") hole for topping lift shackle. Unit projects (maximum) 3 5/16" (85mm) from tube end.
	FB-550 Outhaul Casting: FB550-2: Clear anodized replacement Casting only, for the FB-550 Outhaul Assembly. Casting extends maximum 3 5/16" (85mm) aft of the boom tube.
	FB2 Boom Sheave: NG1-3: Acetyl Sheave is 50mm (2") OD x 14mm (9/16") wide x 10mm (3/8") ID.
	FB2 Boom Sheave - Aluminum: NG1-3A: Anodized Aluminum Sheave is 50mm (2") OD x 14mm (9/16") wide x 10mm (3/8") ID, and is much sturdier than the plastic version.
	Sheave Axle for FB-550 Outhaul: FB2-13L: SS 'Drop-in' Sheave Axle pin is 10mm (3/8") diameter x 83mm (3 1/4") long.

Sparcraft FB-550 Boom Measurements (OD): 6 5/16" x 3 7/8" (160mm x 98mm) Wall Thickness: .102" (2.6mm) Weight/ft.: 3.15 lbs. Weight/M: 4.70 kg Moments of inertia: Ixx = 14.90", Iyy = 4.80" Moments of inertia: Ixx = 620cm4, Iyy = 200cm4 Circumference: 18 3/16" (461mm) Sail slides: 1/2" round slugs (A018, A118) or 1/2" boltrope Lower Track: 31mm x 4.4mm (1 7/32" x 11/64") Alloy: 6005-T6 Standard Lengths: 17' 4 1/2" (5.3M), 20'* (6.1M)
Common Boom usage: F550 Albin Stratus 37; Amphora 37K; Antigua 37; Aphrodite 37, 42K, 51K Mizzen; Arcona 36; Asante 40; Alantide 45; Avance 36; Banner 33, 41; Baltic 35, 37, 38, 39, 42, 43, 48; Barberis 421; Balticat 36; Bavaria 33, 34, 35, 370, 42; BB 12 Racer; Beneteau First 35s5, 35s7, 36s7, 38s5, 405, 53f5, Idylle 13.5, Oceanis 400, 430; Bianca 414, 431, 520; Barberis 421; *C&C 99, 115;** Catana 381; Cayenne 12.55; Colina 36; Colvic 31, 41; Comfortina 38; Contest 38, 40, 42; Cumulant 38, 39, 40, 41; Danish Rose 39; Dehler 36, 37, 372, 39, 41, 41s5, 42, DB1; Diva 39; Dufour 39, 41, 411, 42; Edel 32 Cat, 33 Cat, 35 Cat; Elan 33, 431; Faurby 36, 393; Feeling 446; Finnrist 34; Finnrose 37; First Class Europe 11M; Friendship 38S; Galapagos 43; Gib Sea 126, 37, 372, 41; Glacer 393, 46, 50 Mizzen; Grand Soleil 38, 42, 43; Hallig 11.5M, 42; Hanseat 37, 38, 40, 42; Helmsman 38, 42, 43, 52; HR 36, 38, 39; Island Packet 370, 380, 40;* *J/109; Jeanneau 35OD; Jouet 37; Justin 10M; Kalik 40, 42, 44; Lago 38; Luffe 37, 40, 46; Mamba 35, 36; Mascot 43DS; Mason 43; Moody 38, 42, 44; Morgan 38; Motiva 36, 37, 39, 40, 41, 415, 42, 43, 52K; Najad 34, 360; Omega 36, 42; Puma 38S; Reinke 12S, 12M, 13M, 14M, Super 11, Super l2; Saracen 11M, 13M; Scanmar 345; Selection 11.35; Sigma 36, 38; Skorpion 11M, 12M, 1200MS; Sonate Ovni 37, 39, 41, 43, 45; Sprint 108; Sunbeam 39, 40, 44; Tartan 3500;* Tayana 37; Teliga 11.6M, 13.6M; Wasa 360, 370, 38, 410, 420, 55; Wauquiez 37; X 382, 412, 452;

FB-550 Boom Section FB-550 Boom Section is stocked in a variety of lengths fully anodized. Sections can be ordered bare (unmachined), or cut to shorter lengths with or without milling for other components. Painted finishes and other lengths are available on special order. If you require a complete Boom Assembly, select from components below and contact us with specifications. If you require components not listed below please contact us with details. All FB-550 Boom Ends have provisions for 4 internal lines. Note that Booms used with Furling Masts sometimes use upgraded Outhaul Systems with special Track and Ball-bearing Outhaul Cars, See: Booms for Furling Masts.

FB-550 Boom - Mast Attachment Components FB-550 Booms are connected to a variety of Mast Sections using only a different Toggle to allow for attachment to two sizes of Gooseneck Brackets, detailed below.

Your cart

Spars, Rigging, and Hardware for Sailboats