Isomat BF4 Spreader


BF-4 Standard Spreader Assembly, Complete: BF4SAC-____: Standard BF4 Spreader Assembly is anodized, Tapered, drilled for attachment to standard Cast Spreader Bases, and includes BF4-1K Spreader Tip Assembly. To order specify maximum tube length, and sweepback angle (if any). Painted finishes are available on special order, specify color. Spreaders are also available cut and drilled to fit Spreader Bars as well, please specify part number of Spreader Bar, below.
BF-4 Standard Spreader Tube Only, Tapered & Drilled: BF4TT-____: For replacement purposes when using original end fittings, BF4 Spreader Tubes are available anodized and Tapered with inboard angles cut, and drilled for attachment to standard Cast Spreader Bases and Tip. To order specify maximum tube length, and sweepback angle (if any). Painted finishes are available on special order, specify color. Spreader Tubes are also available cut and drilled to fit Spreader Bars as well, please specify part number of Spreader Bar, below.
*BF-4 Spreader Section, Clear Anodized: BF4CA-____:* BF4 Spreader Section is available clear anodized, but without taper or drilling at lengths up to 20'. To order specify maximum length.

Spreader Tips & Components for BF4 Spreaders
*Spreader Tip Assembly for BF-4 Spreader – Standard: BF4-1K:* Assembly features smooth Outer Tip to capture shrouds, and Inner Tip casting that rests against the Spreader Section and provides a seat for up to 2 shrouds. Kit includes Outer & Inner Tip Castings, Spreader Boot, & screw, for 1 spreader. For use on rigs with Continuous Shrouds up to 10mm (3/8") diameter.
	Outer Tip Casting for BF-4 Spreader: BF4-2: Smooth Outer Tip Casting captures shrouds and fastens to Spreader with (1) #8 SS Screw.
	Inner Tip Casting for BF-4 Spreader: BF4-3: Inner Tip Casting provides seats for 2 shrouds and protects Spreader tube from chafe.
	Spreader Boot for BF-4 Spreader: BF4-4P (pair): White molded vinyl boot protects sails from chafing against Continuous Spreader Tip. Spreader Boots are sold in pairs only.
*Flag Halyard Eye for BF-4 Spreader w/ Continuous Tip: BF4-5C:* Optional SS Flag Halyard Eye fits in slot on underside of Spreader Tip Casting and provides for attachment of Flag halyard with or without a block. For use with Standard (Continuous) Spreader Tips, BF4-1K, and BF4-2.
*Flag Halyard Eye for BF-4 Spreader w/ Discontinuous Tip: BF4-5D:* Optional SS Flag Halyard Eye fits in slot on underside of Spreader Tip Casting and provides for attachment of Flag halyard with or without a block. For use with (standard) Discontinuous Spreader Tips, BF4-8A through BF4-16A.
Triple Shroud Spreader Tip for BF-4 Spreader: BF4-Z3: Cast aluminum Spreader Tip incorporates provisions for up to 3 shrouds. Shrouds are captured by smooth outer casting that is attached to the base casting with one screw. Recessed Allen head cap screw (6mm) threads into captive locknut in base casting. Z4121,4122/Z-3109I

Discontinuous Spreader Tip for BF-4 Spreader w/ 8mm Pin: BF4-8A: Discontinuous Spreader Tip for BF-4 Spreader w/ 9mm Pin: BF4-9A: Discontinuous Spreader Tip for BF-4 Spreader w/ 10mm Pin: BF4-10A: Discontinuous Spreader Tip for BF-4 Spreader w/ 11mm Pin: BF4-11A: Discontinuous Spreader Tip for BF-4 Spreader w/ 12mm Pin: BF4-12A: Discontinuous Spreader Tip for BF-4 Spreader w/ 14mm Pin: BF4-14A: Discontinuous Spreader Tip for BF-4 Spreader w/ 16mm Pin: BF4-16A: Assembly provides horizontal pin for attachment of Discontinuous Shrouds. Includes anodized cast aluminum tip with horizontal pin and cotter pin. Unit projects (maximum) 1 3/4" (45mm) from end of spreader tube. Slot width (at pin) is 1 5/8" (41mm), pin center is 1 1/16" (27mm) from tube end.
	Casting Only for BF-4 Discontinuous Spreader Tip – 8mm: BF4-8: Casting Only for BF-4 Discontinuous Spreader Tip – 9mm: BF4-9: Casting Only for BF-4 Discontinuous Spreader Tip – 10mm: BF4-10: Casting Only for BF-4 Discontinuous Spreader Tip – 11mm: BF4-11: Casting Only for BF-4 Discontinuous Spreader Tip – 12mm: BF4-12: Casting Only for BF-4 Discontinuous Spreader Tip – 14mm: BF4-14: Casting Only for BF-4 Discontinuous Spreader Tip – 16mm: BF4-16:
	As BF4 Discontinuous Spreader Tip Assemblies above, but without pins.
	8mm Pin for BF-4 Discontinuous Spreader Tip: BF4-8P: 9mm Pin for BF-4 Discontinuous Spreader Tip: BF4-9P: 10mm Pin for BF-4 Discontinuous Spreader Tip: BF4-10P: 11mm Pin for BF-4 Discontinuous Spreader Tip: BF4-11P: 12mm Pin for BF-4 Discontinuous Spreader Tip: BF4-12P: 14mm Pin for BF-4 Discontinuous Spreader Tip: BF4-14P: 16mm Pin for BF-4 Discontinuous Spreader Tip: BF4-16P: SS Pins only for Standard Single Pin BF4 Discontinuous Spreader Tip Assemblies, above. Pins are 72mm (2 7/8") long.
Spreader Boot for BF-4 Discontinuous Spreader Tip: BF4-4DP (pair): White molded vinyl boot protects sails from chafing against Standard Single Pin Discontinuous Spreader Tip, above. Spreader Boots are sold in pairs only.
Discontinuous Spreader Tip for BF-4 Spreader w/ 12mm Pin:BF4-12SA: Discontinuous Spreader Tip for BF-4 Spreader w/ 14mm Pin:BF4-14SA: Discontinuous Spreader Tip for BF-4 Spreader w/ 16mm Pin:BF4-16SA: New-Style Discontinuous Spreader Tip Assembly for BF4 Spreader provides enclosed horizontal pin for attachment of Vertical Shrouds and recessed seat for Stemballs on Diagonal Shrouds up to 9/32" or 7mm. Assembly includes clear anodized cast aluminum tip with horizontal pin and cotter pin. Unit is (maximum) 3 1/8" (82mm) wide and projects 3 13/16" (97mm) from end of spreader tube. Slot width is 2 1/16" (52mm), Pin center is 2 7/16" (62mm) from tube end, Stemball seat (for 26mm cup washer) center is 3/4" (20mm) from tube end.
Discontinuous Spreader Tip for BF-4 - 16mm/12mm: BF4-Z1612: Discontinuous Spreader Tip for BF-4 - 16mm/14mm: BF4-Z1614: Cast aluminum Dual Pin Spreader Tip incorporates a 16mm Pin outboard for the main shrouds, and a 12 or 14mm inboard Pin for intermediate shrouds. Design allows for Discontinuous or Continuous Diagonal shrouds. Unit projects (maximum) 3 15/16" (100mm) from end of spreader tube. Slot width (at outboard pin) is 1 5/8" (40mm), pin center is 2 1/2" (62mm) from tube end. Inboard Pin has slot width of 1/2" (12mm), small pin center is 1" (25mm) from tube end. Z-4121,4122I
	12mm pin for BF-4 Dual Pin Tip Casting: BF4-Z-1326: 14mm pin for BF-4 Dual Pin Tip Casting: BF4-Z-1324: 16mm pin for BF-4 Dual Pin Tip Casting: BF4-Z-1325: SS Pins only for BF4 Dual Pin Discontinuous Spreader Tip Assemblies, above. 12mm Pins are 72mm (2 7/8") long, 14 and 16mm Pins are 87mm (3 7/16") long.

BF-4 Spreader Tip for Navtec Tip Cup: BF4-NL528-D1.75: Special BF-4 Spreader Tip for use with Navtec Tip Cups for Discontinuous Rigging. Designed for Navtec L528C Spreader Tip Cups using -12 V2's, and -12, or -17 V1's and Navtec L528D Spreader Tip Cups using -12 V2's, and -17 V1's, unit is also suitable for other Tip Cups with similar dimensions. Cast unit has a 1.760" Tip Cup hole, is .920" thick (at hole) and incorporates slot for anti-rotational lock pin. Unit features appropriate clearances for Tip Cup and projects (maximum) 2 3/4" (70mm) from end of spreader tube. Tip Cup hole center is 1.65" (42mm) from tube end. 304276
BF-4 Spreader Tip for Navtec Tip Cup: BF4-NL528-D1.85: Special BF-4 Spreader Tip for use with Navtec Tip Cups for Discontinuous Rigging. Designed for Navtec L528D Spreader Tip Cups using -12 V2's, and -22 V1's, unit is also suitable for other Tip Cups with similar dimensions. Cast unit has a 1.855" Tip Cup hole, is .905" thick (at hole) and incorporates slot for anti-rotational lock pin. Unit features appropriate clearances for Tip Cup and projects (maximum) 2 3/4" (70mm) from end of spreader tube. Tip Cup hole center is 1.70" (43mm) from tube end. -17-12X,32604072373
BF-4 Spreader Tip for Navtec Tip Cup: BF4-NL528-D2.065: Special BF-4 Spreader Tip for use with Navtec Tip Cups for Discontinuous Rigging. Designed for Navtec L528 Spreader Tip Cups with a 2 1/16" diameter, unit is also suitable for other Tip Cups with similar dimensions. Cast unit has a 2.07" Tip Cup hole, is .905" thick (at hole) and incorporates slot for anti-rotational lock pin. Unit features appropriate clearances for Tip Cup and projects (maximum) 2 7/8" (73mm) from end of spreader tube. Tip Cup hole center is 1.75" (45mm) from tube end. 304277
BF-4 Spreader Tip for Navtec Tip Cup (Port): BF4-NL528-17-30P: BF-4 Spreader Tip for Navtec Tip Cup (Starboard): BF4-NL528-17-30S: Special weld-on BF-4 Spreader Tips for use with Navtec Tip Cups for Discontinuous Rigging. Designed for Navtec L528C Spreader Tip Cups using -17 V2's, and -17, -22, or -30 V1's and Navtec L528D Spreader Tip Cups using -17 V2's, and -22, or -30 V1's, unit is also suitable for other Tip Cups with similar dimensions. Machined from 6061-T6 Aluminum Bar stock, unit has a 2.040" Tip Cup hole, is .870" thick (at hole) and incorporates slot for anti-rotational lock pin on lower side. Unit features appropriate clearances for Tip Cup and projects (maximum) 3 1/16" (77.85mm) from end of spreader tube. Tip Cup hole center is 1.90" (48.25mm) from tube end. 304203PS Ben42S7

Spreader Bases & Components for BF4 Spreaders
Spreader Base Clevis Pin - 12mm: BF4-30: Attaches BF4 Spreader to standard Cast Aluminum Base. SS Clevis Pin is 12mm diameter x 38mm (1 1/2") long.
Old-Style Spreader Base Clevis Pin - 10mm: BF4-30X: Old-Style 10mm Spreader Base Clevis Pins attach BF4 Spreaders with a 10mm pin hole to standard Cast Aluminum Base using special 10mm ID Old-Style Rubber Spreader Base Bushing BF4-31RX, below. SS Clevis Pin is 10mm diameter x 38mm (1 1/2") long.
Plastic Spreader Base Bushing: BF4-31: Hard white plastic Bushing fits Cast aluminum BF4 Spreader Bases, and is used with 12mm Spreader Base Clevis Pin. Bushings are 21mm OD (13/16") x 12mm ID (7/16").
Rubber Spreader Base Bushing: BF4-31R: Black Rubber Bushing fits Cast aluminum BF4 Spreader Bases, and is used with 12mm Spreader Base Clevis Pin. Bushings are 21mm OD (13/16") x 12mm ID (7/16").
Old-Style Rubber Spreader Base Bushing: BF4-31RX: Old-Style Black Rubber Bushing fits Cast aluminum BF4 Spreader Bases, but has a smaller ID for use with Old-Style 10mm Spreader Base Clevis Pin. Bushings are 21mm OD (13/16") x 10mm ID (3/8").
Spreader Base for BF-4 Spreader - Port: BF4-35P: Spreader Base for BF-4 Spreader - Starboard: BF4-35S: Unique spreader base design incorporates (2) sockets for use with stemballs on lower and intermediate shrouds. Cast aluminum bases are welded to the mast and accommodate a variety of spreader angles depending on how the inboard spreader end is cut. BF4 Spreader is attached with (1) clevis pin that goes through a bushing to allow for some shock loading. Bases have hole for 21mm (13/16") OD Spreader Bushing. Base measures 5 1/8" high (maximum) x 4 7/8" long, and projects 5" out from the Mast. For use with NG-46 and larger NG Mast sections.

Spreader Bars & Components for BF4 Spreaders
*Rectangular Aluminum Spreader Bar for BF-4 Spreader: BF4-40-__:* Original Rectangular Aluminum Bars for BF4 Spreaders are available in a variety of angles and lengths for replacement purposes. To Order: Specify length and angle aft.
*Cast Aluminum Base for BF-4 Spreader Bar: BF4-40C:* Cast Aluminum Base is contoured to fit the mast section and reinforces it for use with any angle Spreader Bar. Features boss to allow a straight cut on the spreader end. Slot in base is 30mm x 70mm long. Plates (2 required) are attached to the mast with (4) 1/4" rivets. Used with NG-46 and larger Mast Sections.
*Doubler Plate for BF-4 Rectangular Spreader Bar, NG Masts: BF4-40N:*
Formed Aluminum Doubler Plate is contoured to fit NG-60 - NG-86 Mast Sections and reinforces it for use with any BF4-40 Rectangular Spreader Bar. Unit features boss to allow a straight cut on the spreader end. Anodized plates (2 required) are attached to the mast with (6) 3/16" rivets, and have 26mm x 47mm (1" x 1 7/8") Slot for BF4-40 Rectangular Spreader Bar. Plate is 140mm (5 1/2") long x (maximum) 77mm (3") high x 1/8" thick. +52432/165248
*Doubler Plate for BF-4 Rectangular Spreader Bar, F Masts: BF4-40F:*
Formed Aluminum Doubler Plate is contoured to fit the mast section and reinforces it for use with any size BF4-40 Rectangular Spreader Bar. Unit features boss to allow a straight cut on the spreader end. Anodized plates (2 required) are attached to the mast with (6) 3/16" rivets, and have 26mm x 47mm (1" x 1 7/8") Slot for BF4-40 Rectangular Spreader Bar. Plate is 142mm (5 5/8") long x (maximum) 77mm (3") high x 1/8" thick. Used with F385-1060 Mast Sections. +52493

*Aluminum Spreader Bar for BF-4 Spreader: BF4-41-0:* New-style Extruded Aluminum Spreader Bar for BF4 Spreader is 1 1/16" (27mm) thick x 2 9/16" (65mm) wide x 15 3/4" (400mm) long, and incorporates a 5 degree vertical angle for 0 degree (in-line) Spreaders. Used with NG-46 and larger Mast Sections.
Note: Aluminum Spreader Bars for BF4 Spreaders are also available in a variety of lengths and angles not listed here, and are sometimes machined for use with a variety of wire and rod Stemballs. When inquiring please specify Mast Section, sweepback angle, and rigging configuration. MMW/LOA; A135/385, B160/410, C187/437. 110E-HC

*SS Spreader Bar for BF-4 Spreader: BF4-43-___:* New-style cast SS Spreader Bar for BF4 Spreader incorporates seats for wire or rod Stemballs and is suitable for Spreaders angled up to 30� aft. To order: Specify length, or Maximum Mast width.
*Doubler Plate for BF-4 SS Spreader Bar: BF4-43F:* Formed Aluminum Doubler Plate is contoured to fit the mast section and reinforces it for use with any size BF4-43 SS Spreader Bar. Slot in plate is (maximum) 2 3/4" (70.5mm) long x 1.3" (32.5mm) wide. Plates (2 required) are attached to the mast with (6) 3/16" (5mm) rivets. Used with F385-1060 Mast Sections. +52903

Spars, Rigging, and Hardware for Sailboats