Sparcraft IM-260 Mast

Common Mast usage: Beneteau Oceanis 311; Gemini 105; *J/92, J/97;** Hunter 310, 340, 360; Pacific Seacraft; Seaward 30, 32;
See also Sparcraft Booms, and Sparcraft Spreaders. See also, Sparcraft IM Masts, and other Sparcraft Mast Sections.

IM-260 Mast Components
The IM-260 was designed as a direct replacement for the discontinued Isomat NG-37 Mast Section. The Integral Spinnaker Track was eliminated, resulting in lower overall weight and increased strength to weight ratios. Except for the integral Spinnaker Track, the Sections are identical, and most parts are interchangeable. For complete Mast Assemblies, contact us with details. Parts used primarily or exclusively with the IM-260 Mast Section are listed here. * For all other parts, See Isomat NG-37 Mast Section.

FM1 Spinnaker Pole Mast Eye: FM1-37: Fixed Eye for attachment of whisker or spinnaker pole on the front of the mast. Used where vertical adjustment of inboard pole end is not required, Cast SS Pole eye is curved to fit the front of the Mast. Base is 46mm (1 3/4") high x 47mm (1 7/8") wide, and attaches to Mast with (4) 3/16" (5mm) screws or rivets on 32mm vertical x 35mm centers. 8mm Ring has 40mm (1 1/2") ID. Used with FM-35 through FM-101, and other Mast Sections.

NG1 Gooseneck/Vang Bracket - Reinforced: NG1-11R: Special reinforced aluminum Gooseneck/Vang Bracket fits IM180-IM330, and NG-28-NG-51 Mast Sections. Welded Bracket is 4 5/8" (118mm) high x 3" (78mm) wide, and is fastened with eight (8) 1/4" (6mm) rivets. Bracket has holes for 12mm (7/16") Vertical Toggle Pin (NB1-1), and is compatible with all other NG1-1 vertical Gooseneck Pins.

IM-260 Deck Collar: NG28-12: Cast Aluminum Deck Collar for use with NG-37/IM-260 & other Mast Sections. Deck Collar has provisions for 12 new-style Mast Base Block Studs and a SS Bail, NG2-20, for attachment of a soft Boom Vang. Nut slots on underside of casting and 12mm holes allow for attachment of NG1 or NG2 threaded Block Studs, and/or Mast Base Turning Blocks, NGA-40 or NGA-41, without unfastening Deck Collar. Includes four (4) provisions for deck tie-down turnbuckles, and slots for (2) NGA-18 and (4) NGA-19 Mast Wedges. Cast Deck Collar is 10 7/8" (276mm) long x 9 3/8" (238mm) wide, and fastens to deck with (4) 1/4" (6mm) Screws. Maximum inside dimensions 7 9/16" x 4 15/16".
	*Urethane Mast Collar Wedge for NG28-12 Collar: IM260-12MW:*
	Urethane Mast Collar Wedge fits tightly between IM260 Mast and *NG28-12* Deck Collar to provide even loading all around the mast and increased resistance to water penetration. One-piece molded construction is far superior to individual wedges, but requires that unit be slipped onto Mast before stepping. Unit is (maximum) 9" (228mm) long x 7 3/8" (188mm) wide x 3 1/2" (88mm) high.
	*Mast Collar Wedge – Small Rubber: NGA-18:* Heavy Extruded Rubber Wedge for use with Isomat and other Masts. Small stepped Rubber Wedge is used to support the mast as it passes through the Deck Collar. Wedge is 2 3/4" (70mm) long x 1 1/8" (28mm) wide, and is 15/16" (24mm) thick at the top tapering to 3/8" (10mm) thick at the bottom. IM260 Deck Collars require 6 Small Mast Wedges (NG1-18).
	NG2 Mast Step Bail: NG2-20: SS Formed Bail fits in integral slot in aft side of Deck Collar, used for attachment of Boom Vang. Bail is installed from underside of Deck Collar, which must be removed to install Bail. Bail is made from 10mm (3/8") rod, and is 2 3/4" (70mm) long x (maximum) 1 15/16" (50mm) high.

IM-260 Mast Boot - Special J/92, J/97: IM260-15BJ: Heavy molded Black Rubber Boot for use with IM-260 Mast and Special J-Boat Deck Collar. As used on J/92, and J/97.
*Urethane Mast Collar Wedge - Special J/92: IM260-12MWJ:*
Urethane Mast Collar Wedge fits tightly between IM260 Mast and Special J/92 Deck Collar to provide even loading all around the mast and increased resistance to water penetration. One-piece molded construction is far superior to individual wedges, but requires that unit be slipped onto Mast before stepping. As used on J/92.

IM-260 Mast Step - Deck Mount: IM260-5: Mast Step for use with IM-260 & IM-330 Mast Sections has provisions for (8) new-style Mast Base Turning Blocks and a SS Bail, NG2-20, for attachment of a soft Boom Vang. Nut slots on underside of casting and 12mm holes allow for attachment of Mast Base Turning Blocks, NGA-40 or NGA-41, without unfastening Mast Step. Cast Aluminum Mast Step is 9 1/4" (235mm) long x (maximum) 8" (200mm) wide, and fastens to deck with (4) 5/16" (8mm) FH Screws. Unit is marked 556190. 265,365E,330
	NG2 Mast Step Bail: NG2-20: SS Formed Bail is used for attachment of Boom Vang or/and standard blocks for leading halyards aft. Fits in integral slots in NG46 and larger Mast Steps. Bail is installed from underside of Mast Step Casting, Mast Step must be removed to install Bails. Bail is made from 10mm (3/8") rod, and is 2 3/4" (70mm) long x (maximum) 1 15/16" (50mm) high.
IM-260 Mast Step Plug: IM260-6P: Mast Step Plug for IM-260 Mast Section is specifically designed for use with IM260-6B Mast Step Base. Plug is fastened directly to Mast and features standpipe and drainage holes to prevent water ingress through electrical cavity. Anodized Cast Aluminum Mast Plug is 6 3/4" long x (maximum) 4 1/2" wide (235 x 116mm). Unit is marked 36014402603.
IM-260 Mast Step Base for Special Plug: IM260-6B: Mast Step Base for use with IM-260 Mast Plug has provisions for (8) clevis-pin like 12mm Block Studs, NG2-21, for attachment of Blocks with Bolt for Block Studs for leading halyards aft, and a Bail assembly (FM3-20A), for attachment of a soft Boom Vang. Block Studs insert in recessed 12mm holes from underside of casting and have a 6mm (1/4") hole for block attachment. Mast Step must be removed to install Block Studs. Anodized cast Aluminum Mast Step is 9 11/16" long x 8 5/16" wide (245 x 210mm), and fastens to deck with (4) 8mm (5/16") FH Screws. Unit is marked 36054402601. Shown with optional Bail assembly FM3-20A.
	NG2 Mast Step Block Stud Pin - 12mm: NG2-21: 12mm SS Clevis Pin-shaped Block Stud is used for attachment of shackle or block to lead halyards aft. Fits in integral recessed 12mm hole in a variety of Mast Steps and Deck Collars. Block Stud is installed from underside of Casting, Casting must be removed to install Block Studs. Small head Block Stud is 12mm diameter x 45mm (1 3/4") long (maximum), with a 30mm (1 3/16") grip length and a 6mm (1/4") hole for shackle pin or Block bolt.
	FM3 Mast Step Bail Ass'y: FM3-20A: Forged SS Mast Step Bail assembly is used for attachment of Boom Vang on a variety of Sparcraft Mast Steps. Bail (10mm) is installed through top of Mast Step Casting, 10 x 68mm rod is installed from underside.

IM-260 Internal Waterproofing Plug: IM260-WP: Internal Waterproofing Plug is installed in Keel-stepped Masts to prevent water intrusion below deck. Assembly consists of 2 plastic pieces carefully cut to fit Mast interior with central PVC standpipe to allow passage of electrical wires. Unit slides up from the bottom of the Mast to a point just above Deck level where a hole is drilled in Mast to allow for application of expanding foam between plastic pieces. Second hole is drilled just above upper plastic piece to allow water drainage.
	Internal Waterproofing Foam: NGA-Foam: Expanding foam is used for installation of Internal Waterproofing Plug. Single-use can is sufficient for installation of any Internal Waterproofing Plug.

Your cart

Spars, Rigging, and Hardware for Sailboats