Isomat BF4 Spreader

Please Note: Early version of the BF-4 Spreader (pre-1985) had similar dimensions but had no 'tail'. Spreaders were supplied with a cut and welded taper (to 3" x 7/8"), and a welded tip. While the Old-style BF-4 Spreaders and extrusion are no longer available, the original welded tip, BF4-1XA, detailed below, is. Note: Old-style BF-4 Spreaders and Spreader Bases are not compatible with the New-style BF-4 Spreaders or Spreader Bases shown here.
BF-4 Spreaders Spreader Tips & Components Spreader Bases & Components Spreader Bars & Components

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 Continuous Spreader Tip Casting BF4-2, and provides for attachment of Flag halyard with or without a block.

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

BF-4 Discontinuous Spreader Tip w/ 8mm Pin: BF4-8A: BF-4 Discontinuous Spreader Tip w/ 9mm Pin: BF4-9A: BF-4 Discontinuous Spreader Tip w/ 10mm Pin: BF4-10A: BF-4 Discontinuous Spreader Tip w/ 11mm Pin: BF4-11A: BF-4 Discontinuous Spreader Tip w/ 12mm Pin: BF4-12A: BF-4 Discontinuous Spreader Tip w/ 14mm Pin: BF4-14A: BF-4 Discontinuous Spreader Tip 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.
*Flag Halyard Eye for BF-4 Standard Discontinuous Tip: BF4-5D:* Optional SS Flag Halyard Eye fits in slot on underside of Standard Discontinuous Spreader Tip Castings BF4-8 through BF4-16, above, and provides for attachment of Flag halyard with or without a block.

BF-4 Spreader Tip w/ Two (2) Pins � 16mm/12mm: BF4-Z1612: BF-4 Spreader Tip w/ Two (2) Pins � 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 w/ 12mm Pin & Stemball Seat: BF4-12SA: BF-4 Spreader Tip w/ 14mm Pin & Stemball Seat: BF4-14SA: BF-4 Spreader Tip w/ 16mm Pin & Stemball Seat: BF4-16SA: New-Style Discontinuous Spreader Tip Assembly for BF4 Spreader provides enclosed horizontal pin for attachment of Vertical Shrouds and recessed seat for NG1 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. As used on Jeanneau Sun-Odyssey 409 (lower spreader), and others. 162261

BF-4 Spreader Tip for Navtec Tip Cup, 1.65": BF4-NL528-D1.65: BF-4 Spreader Tip for use with Navtec Tip Cups for Discontinuous Rigging. Designed for Navtec L400 Spreader Tip Cups, and others with similar dimensions. Cast unit has a 1.660" Tip Cup hole, is .745" thick (at hole) and has outboard hole for 5/16" (8mm) 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. As used on Beneteau First 40.7 (middle spreader), and others. 162261
BF-4 Spreader Tip for Navtec Tip Cup, 1.75": BF4-NL528-D1.75: 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 L528-171201D 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 has slot (top & bottom) 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, 1.85": BF4-NL528-D1.85: 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 slots (top & bottom, & vertical) 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. As used on Beneteau First 36.7 & 40.7 (lower spreader), and others. N-171201B,32604072373
BF-4 Spreader Tip for Navtec Tip Cup, 2.065": BF4-NL528-D2.065: BF-4 Spreader Tip for use with Navtec Tip Cups for Discontinuous Rigging. Designed for Navtec L528-221701D 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 vertical 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. As used on Beneteau 42 S7, and others. 304203PS

BF-4 Spreader Tip for Rod Spreader Bend: BF4-19A: BF-4 Spreader Tip for use with standard Rod Spreader Bends. Cast unit has a 1/2" slot with a SS Cover Plate and is 3/4" thick (at hole). SS Cover Plate is 5/8" wide x 2 3/8" long and fastens to Tip with (2) 5mm x 12mm RH screws. Unit projects (maximum) 1" (25mm) from end of spreader tube. 162261M

Spreader Tip for BF-4 OLD-style Spreaders: BF4-1XA: Spreader Tip for BF-4 Old-style Spreaders. Tip is welded to BF-4 Old-style Spreader tapered to 3" x 7/8". Cast aluminum Spreader Tip is (maximum) 3" long x 7/8" thick, and extends 1 5/8" beyond Spreader tube. Includes 6mm SS retaining screw to captivate shroud. 304201 Please Note: Old-style BF-4 Spreader had similar dimensions to the current BF-4, but had no 'tail'. Old-style BF-4 Spreaders and extrusion are no longer available. Old-style BF-4 Spreaders and Spreader Bases are not compatible with the BF-4 Spreaders or Spreader Bases shown here.

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 NG2 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 Bar for BF4 Spreaders is 25mm thick x 40mm wide x 400mm (15 3/4") long, and are available in a variety of vertical and horizontal angles for replacement purposes. Standard vertical angle is 5�. To Order: Specify angle aft, and (for special applications) alternate vertical angles.
*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 the mast section and reinforces it for use with any size BF4-40 Rectangular Spreader Bar. Plate is (maximum) 5 1/2" (140mm) long x 3" (77mm) high x 1/8" thick. Slot in plate is 1 7/8" (47mm) long x 1" (26mm) high. Anodized plates (2 required) are attached to the mast with (6) 3/16" (5mm) rivets. Used with NG60 - NG86 Mast Sections. +52432/165248
*Doubler Plate for BF-4 Rectangular Spreader Bar, FM 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. Plate is (maximum) 5 5/8" (144mm) long x 3" (77mm) high x 1/8" thick. Slot in plate is 1 7/8" (47mm) long x 1" (26mm) high. Anodized plates (2 required) are attached to the mast with (6) 3/16" (5mm) rivets. Used with FM385-1060 Mast Sections. +52493

Extruded Aluminum Spreader Bar for BF-4 Spreader: BF4-41-0: New-style Extruded Aluminum Spreader Bar for BF4 Spreader is (maximum) 27mm (1 1/16") thick x 65mm (2 9/16") wide x 16" (405mm) long, and incorporates a 5� vertical angle for 0� (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

Machined Aluminum Spreader Bar for BF-4 Spreader & FM560E Mast: BF4-42-F560E:
Special Machined Aluminum Spreader Bar for BF4 Spreader is (maximum) 27mm (1 1/16") thick x 65mm (2 9/16") wide x 16" (405mm) long, and incorporates a 5� vertical angle for 30� aft Spreaders. Special Bar has NG1 Stemball seats and removable aft sections (attached with screws) for installation in Furling Mast. As used for lower Spreaders on Jeanneau Sun Odyssey 409 with FM560E Furling Mast Section.

*SS Spreader Bar for BF-4 Spreader: BF4-43-111:* *SS Spreader Bar for BF-4 Spreader: BF4-43-115:* *SS Spreader Bar for BF-4 Spreader: BF4-43-121.5:* *SS Spreader Bar for BF-4 Spreader: BF4-43-128.5:* *SS Spreader Bar for BF-4 Spreader: BF4-43-140:* *SS Spreader Bar for BF-4 Spreader: BF4-43-144:* *SS Spreader Bar for BF-4 Spreader: BF4-43-156:* *SS Spreader Bar for BF-4 Spreader: BF4-43-171.5:* *SS Spreader Bar for BF-4 Spreader: BF4-43-182:* New-style cast SS Spreader Bar for BF4 Spreader incorporates seats for NG1 wire or rod Stemballs and is suitable for Spreaders angled up to 30� aft. SS Spreader Bar is (maximum) 1 3/8" (35mm) high x 3 5/8" (93mm) wide, and incorporates a 5 degree vertical angle. This item requires a contoured cut-out in the Mast wall, and is available in a variety of lengths for use with different Mast Sections. Standard sizes (lengths) are listed above, and denote the Mast width that these Bars are used with. Most units are marked with that length (length of center section). Used with Mast Sections up to NG-105. To order: Specify Bar length, Bar size (as marked), or Mast Section. Please Note: This item is also available on a Custom basis in lengths for non-standard Mast Sections, Please specify.
*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. Plate is (maximum) 5 5/8" (144mm) long x 3" (77mm) high. Slot in plate is (maximum) 3 5/8" (93mm) long x 1 3/8" (35mm) high. Plates (2 required) are attached to the mast with (6) 3/16" (5mm) rivets. Used with FM385-1060 Mast Sections. +52903

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