Masthead Spinnaker Bails

Masthead Spinnaker Bails
Masthead Spinnaker Bails are used to attach a Swivel Block for a Spinnaker Halyard at the top of the Mast, and forward of the Headstay. This arrangement allows the Spinnaker to be tacked forward of the Headstay, as all true Spinnakers must. Most Standard Spinnaker Bails can be attached to the Masthead with screws and locknuts, some Masthead configurations have insufficient clearance for nuts on the underside and mounting will require threaded holes for machine screws. Most Spinnaker Bails listed below are also listed on specific Mast pages, under the Mastheads they are commonly used with. In most cases the easiest way to find an appropriate Spinnaker Bail is by determining which Mast Section you have and looking there, See: Spar Parts by Manufacturer. Before ordering a Spinnaker Bail, check your Masthead to be sure the size of the Spinnaker Bail is appropriate, and especially that the hole spacing is compatible with your Masthead. Rig-Rite also stocks some Spinnaker Bails not listed here. If no Spinnaker Bail listed here is compatible with your application, please contact us with the configuration and dimensions you require. A variety of blocks for use with these Spinnaker Bails are available, See Spinnaker Halyard Blocks. See also: Spinnaker Poles & Parts, and Spinnaker Cars.

Standard Masthead Spinnaker Bails Double Masthead Spinnaker Bails Masthead Spinnaker Crane U-bolts Isomat Masthead Spinnaker Cranes Z-Spar Masthead Spinnaker Bails

Standard Masthead Spinnaker Bails
1/4" Masthead Spinnaker Bails Commonly used on boats in the 20' (6M) range.
Masthead Spinnaker Bail: SP-019-2: SS 1/4" bail is welded to a 1 3/4" x 1 1/4" flat plate which attaches to the top of the masthead with (2) 1/4" RH machine screws. Screw hole spacing (to centers) is 1" fore & aft. Unit is 3" long x 1 1/4" wide, bail projects 1 1/4" forward of plate. Mounting requires drilling & tapping (2) 1/4-20 holes, or thru-bolting using 1/4" screws and nuts. As used on Cape Dory Typhoon and others using the Spartan CD-2 Masthead Assembly, as well as Kenyon Single channel Mastheads.
Masthead Spinnaker Bail: K-1422: Special Masthead Spinnaker Bail is Designed to fit over Kenyon Double channel Mastheads. SS 1/4" bail is welded to a 1 3/4" x 1 5/8" flat plate which attaches to the top of the masthead with (2) 3/16" screws. Bail is angled downward and projects 1 1/4" forward of plate. Designed for use with Kenyon 1 3/8" wide, Double channel Masthead Assemblies, unit attaches with (2) #10 x 1/2" RH machine screws and locknuts. Mounting may require drilling (2) 3/16" holes.

5/16" Masthead Spinnaker Bails Commonly used on boats up to 37' (11M).
Masthead Spinnaker Bail: SP-083-1: Heavy 5/16" SS bail is welded to a 2 1/4" x 1 7/8" flat plate which attaches to the top of the masthead with (4) 1/4" RH machine screws. Screw hole spacing (to centers) is 1 1/2" fore and aft x 3/4" wide, Bail projects 1 1/2" forward of plate. Mounting in most Pearson and Spartan applications requires drilling & tapping (4) 1/4-20 holes. As used on Spartan CD-3.5 and CD-4 Masthead Assemblies, and many Pearson Mastheads. See also, Double Masthead Spinnaker Bail, SP-083-1D, below.
*Masthead Spinnaker Bail: K-10454:* SS 5/16" bail is welded to a Trapezoidal SS plate which bolts to the top of the masthead with (3) 1/4" x 3/4" screws and locknuts. Trapezoidal plate measures 2" long x 2 7/8" (maximum) wide. Aft screw holes are on 2" centers, Bail is angled downward and projects 1 3/4" forward of plate. Mounting requires drilling (3) 1/4" holes. As used on *K-11348* Masthead Assembly for Kenyon 4060 and other Mast Sections.
*Port Offset - Masthead Spinnaker Bail: K-10454P:* Port Offset SS 5/16" bail is welded to a Trapezoidal SS plate which bolts to the top of the masthead with (3) 1/4" x 3/4" screws and locknuts. Trapezoidal plate measures 2" long x 2 7/8" (maximum) wide. Aft screw holes are on 2" centers, Offset Bail is angled to Port and downward, and projects 1 1/2" forward of plate. Mounting requires drilling (3) 1/4" holes. As used on *K-11348* Masthead Assembly for Kenyon 4060 and other Mast Sections. As K-10454 (above), but with bail offset to Port side to reduce interference between Spinnaker halyard block and Headstay.
*Starboard Offset - Masthead Spinnaker Bail: K-10454S:* Starboard Offset SS 5/16" bail is welded to a Trapezoidal SS plate which bolts to the top of the masthead with (3) 1/4" x 3/4" screws and locknuts. Trapezoidal plate measures 2" long x 2 7/8" (maximum) wide. Aft screw holes are on 2" centers, Offset Bail is angled to Starboard and downward, and projects 1 1/2" forward of plate. Mounting requires drilling (3) 1/4" holes. As used on *K-11348* Masthead Assembly for Kenyon 4060 and other Mast Sections. As K-10454 (above), but with bail offset to Starboard side to reduce interference between Spinnaker halyard block and Headstay.
Masthead Spinnaker Bail: K-10593: Heavy 5/16" SS bail is welded to a flat plate which bolts to the top of the masthead with (4) 5/16" x 3/4" screws and locknuts. Plate measures 2 1/4" square. Screw hole spacing (to centers) is 13/16" fore and aft x 1 1/8" wide. Bail is angled downward and projects 1 5/8" forward of plate. Mounting requires drilling (4) 5/16" holes. As used with *K-10594* Masthead Assembly on Kenyon 5072 mast. mil

3/8" Masthead Spinnaker Bails Commonly used on boats up to 50' (15M).
Masthead Spinnaker Bail: SP-158-2: Heavy 3/8" SS bail is welded to a 3" x 2 1/2" flat plate which bolts to the top of the masthead with (4) 1/4" RH machine screws and locknuts. Screw hole spacing (to centers) is 2" fore and aft x 7/8" across. Bail projects 1 3/4" forward of plate. Mounting requires drilling (4) 1/4" holes. As used on Spartan CD-4.5 and CD-5 Masthead Assemblies. dcc
Masthead Spinnaker Bail: K-11302: Heavy 3/8" SS bail is welded to a flat plate which bolts to the top of the masthead with (4) 5/16" x 3/4" screws and locknuts. Plate measures 2 1/4" long x 2 5/8" wide. Screw hole spacing (to centers) is 13/16" fore and aft x 1 1/8" wide. Bail is angled downward and projects 1 3/4" forward of plate. Mounting requires drilling (4) 5/16" holes. As used with Masthead Assemblies on Kenyon 5280 and 6092 Mast Sections.
Masthead Spinnaker Bail: K-10435: Heavy 3/8" SS bail is welded to a Trapezoidal SS plate which bolts to the top of the masthead with (4) 5/16" x 3/4" screws and locknuts. Trapezoidal plate measures 2 1/2" long x 3 7/8" (maximum) wide. Forward screw holes are on 7/8" centers, aft holes are 2 7/8" apart. Bail is angled downward and projects 1 3/4" forward of plate. Mounting requires drilling (4) 5/16" holes.

7/16" Masthead Spinnaker Bails
Masthead Spinnaker Bail: K-11302XLS: Heavy 7/16" SS bail is welded to a flat plate which bolts to the top of the masthead with (4) 5/16" screws and locknuts. Base measures 3 1/4" long x 3" wide. Screw hole spacing (to centers) is 2 3/8" fore & aft x 1 1/4" wide. Bail projects 1 3/4" forward of plate. Mounting requires drilling (4) 5/16" holes. wc/do

Double Masthead Spinnaker Bails Double Masthead Spinnaker Bails are used primarily in racing applications to allow for attachment of 2 separate Spinnaker Halyard Swivel Blocks (port and starboard) for hoisting 2 Spinnakers independently. In cruising applications, they offer an offset Spinnaker Halyard attachment point less likely to interfere with the furling system Halyard Swivel.
Double Masthead Spinnaker Bail: K-10434D-F: Double Masthead Spinnaker Bail is cut from 5mm SS plate and attaches to the top of the masthead with (6) 1/4" (6mm) screws and nuts. Plate has (2) slots (7/8" x 7/16") for attachment of any Swivel Blocks. Plate is (maximum) 3 3/4" long x 4 1/4" wide. Screw holes are in 2 rows, 7/8" apart. Mounting requires drilling (6) 1/4" holes. rg
Double Masthead Spinnaker Bail: SP-083-1D: Heavy 5/16" SS bails are welded to a 2 1/4" x 4 1/4" (maximum) wide flat plate which attaches to the top of the masthead with (4) 1/4" RH machine screws. Screw hole spacing (to centers) is 1 1/2" fore and aft x 3/4" wide, the same as *SP-083-1, above, for which it is a drop-in replacement. Bails project 1/2" forward of plate and are 3 1/2" apart at forward edge. Mounting in most Pearson and Spartan applications requires drilling & tapping (4) 1/4-20 holes. As used on Spartan CD-3.5* and CD-4 Masthead Assemblies, and many Pearson Mastheads.
Large Double Masthead Spinnaker Bail: K-10435D-W: Double Masthead Spinnaker Bail has 3/8" SS bails welded to a 4 3/4" long x 4 3/4" (maximum) wide x 3/16" flat plate which attaches to the top of the masthead with (6) 5/16" screws and nuts. Mounting holes (in 2 rows, 1 1/8" apart) are on 1 5/32" centers. Bails project 1" forward of plate and are 5" apart at forward edge. Mounting requires drilling (6) 5/16" holes. wc/do
Large Double Masthead Spinnaker Bail: K-10435D-P: Large Double Masthead Spinnaker Bail is cut from heavy 5/16" (8mm) SS plate and attaches to the top of the masthead with (6) 1/4" (6mm) screws and nuts. Plate is bent downward at 20 degrees with (2) 1" holes for attachment of any Swivel Blocks, 4 3/8" apart. Plate is (maximum) 6" long x 6" wide. Screw holes (in 2 rows, 15/16" apart) are on 15/16" centers. Plate projects 2 1/4" forward of masthead. Mounting requires drilling (6) 1/4" holes. rg
Large Double Masthead Spinnaker Crane Ass'y: Z-1079XA:
Large Double Masthead Spinnaker Crane Assembly with SS U-bolts. Y-shaped Aluminum Casting includes 2 SS U-bolts, Z-165A, (7" apart), and is designed to bolt to the top of a flat Masthead with (5) 5/16" (8mm) screws and nuts. Requires (minimum) 6 1/2" long x 3 1/2" wide mounting surface. Unit is (maximum) 9" long x 9 5/8" wide x 1 3/16" thick. U-bolts are 3/8" (10mm) diameter and project 1 1/2" (maximum) below cast plate. Screw holes (in 2 rows, 1 5/8" apart) are on 2 3/8" centers with the forward hole centered. Plate projects 2 3/8" forward of flat. Mounting requires drilling (5) 5/16" holes. Used on Z1001 & Z1100E Mast Sections, and in other applications. See also, Z-Spar Masthead Spinnaker Bails.

Masthead Spinnaker Crane U-bolts
Masthead Spinnaker Crane U-bolt - 5/16": K-10436: SS U-bolt assembly is 5/16" diameter x 2 1/2" LOA x 1 3/8" ID, (1 11/16" centers). Comes with (2) SS nuts for underside of Spinnaker Crane, and (2) SS Locknuts for upper side. For attachment of spinnaker halyard blocks.

Masthead Spinnaker Crane U-bolt - 3/8" on 1" centers: K-10436-61:
SS U-bolt assembly is 3/8" diameter x 2 5/8" LOA x 5/8" ID, (1" centers). Comes with (2) SS nuts and cotter pins for upper side. MM
Masthead Spinnaker Crane U-bolt - 3/8" on 1 1/4" centers: K-10436-61.2:
SS U-bolt assembly is 3/8" diameter x 2 5/8" LOA x 7/8" ID, (1 1/4" centers). Comes with (2) SS nuts and cotter pins for upper side. MM
Masthead Spinnaker Crane U-bolt - 3/8" on 1 7/16" centers: K-10436-61.4:
SS U-bolt assembly is 3/8" diameter x 2 5/8" LOA x 1 1/16" ID, (1 7/16" centers). Comes with (2) SS nuts for underside of Spinnaker Crane, and (2) SS Locknuts for upper side. ca
Masthead Spinnaker Crane U-bolt - 3/8" on 1 5/8" centers: K-10436-61.6:
SS U-bolt assembly is 3/8" diameter x 2 5/8" LOA x 1 1/4" ID, (1 5/8" centers). Comes with (2) SS nuts for underside of Spinnaker Crane, and (2) SS Locknuts for upper side.

Masthead Spinnaker Crane U-bolt - 10mm on 28mm centers: K-10436-6M:
SS U-bolt assembly is 10mm (3/8") diameter x 2 3/4" LOA x 19mm (3/4") ID, (28mm (1 1/8" centers)). Comes with (2) SS nuts for underside of Spinnaker Crane, and (2) SS Locknuts for upper side. mil

Masthead Spinnaker Crane U-bolt - 1/2" on 1 3/4" centers: K-10762B:
SS U-bolt assembly is 1/2" diameter x 3 1/2" LOA x 1 1/4" ID (1 3/4" centers). Comes with (2) SS nuts for underside of Spinnaker Crane, and (2) SS Locknuts for upper side. ca
Masthead Spinnaker Crane U-bolt - 1/2" on 2" centers: K-10762A:
SS U-bolt assembly is 1/2" diameter x 3 5/8" LOA x 1 1/2" ID (2" centers). Comes with (2) SS nuts for underside of Spinnaker Crane, and (2) SS Locknuts for upper side.

Isomat Masthead Spinnaker Cranes
NG-1 Masthead Spinnaker Crane: NG1-2: Spinnaker Crane for use only with NG-1 Masthead. NG-1 Mastheads are easily identified by having only 2 sheaves (or provision for only 2 sheaves) on the forward side. Attaches with (2) 1/4" bolts and locknuts, and (2) 6mm (3/16") screws that go into the threaded holes for the masthead Cover Plate screws. SS Plate is (maximum) 3 7/8" long x 4 3/8" wide x 3/16" thick, and projects 2" forward of the masthead. Mounting requires drilling (2) 1/4" holes in the masthead. Unit comes complete with fasteners. See also Isomat Mast Sections.
NG-2 Masthead Spinnaker Crane: NG2-2: Spinnaker Crane for use only with NG-2 Masthead. NG-2 Mastheads are easily identified by having 4 sheaves (or provision for 4 sheaves) on the forward side. Attaches with (4) 5/16" (8mm) bolts and locknuts. SS Plate is (maximum) 4" long x 5 3/8" wide x 1/4" thick, and projects 1 3/8" forward of the masthead. Easily positioned on the masthead, mounting requires drilling (4) 5/16" holes in the masthead. Unit comes complete with fasteners. See also Isomat Mast Sections.

Double Masthead Spinnaker Bail: FM2-2: Spinnaker Crane is commonly used with a variety of FranceSpar and Sparcraft Mastheads. Double Masthead Spinnaker Bail is cut from 5mm SS plate and attaches to the top of the masthead with (6) 6mm (1/4") screws and locknuts. Plate has (2) slots (7/8" x 7/16") for attachment of any Swivel Blocks. Plate is (maximum) 3 3/4" long x 4 1/4" wide. Screw holes are in 2 rows, 7/8" apart. Mounting requires drilling (6) 1/4" holes.
Masthead Spinnaker Crane U-bolt - 10mm: FM2C-2U: SS U-bolt assembly is commonly used on a variety of Sparcraft Mastheads. Unit is 10mm (3/8") diameter x 2 1/2" LOA x 1 1/4" ID (1 5/8" centers). Comes with (2) SS nuts for underside of Masthead, and (2) SS Locknuts for upper side.

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