Isomat Deck Tie-down Turnbuckles

Deck Tie-down Turnbuckles listed below are commonly used on Masts produced by Isomat, Sparcraft and Charleston Spars. Turnbuckles connect Mast to Deck Collar to prevent the Deck from rising when shroud tension is applied. Stainless Steel Turnbuckles have an Upper 'T' fitting designed to fit special receptacles built into Deck Collars made by Isomat and Sparcraft. The Lower end is fitted with a Stemball or T-Ball and attached to the Mast using a Stemball Backing Shell or a T-Ball Backing Plate. Sometimes used singly attached on Mast front, and sometimes in pairs mounted port and starboard.

*Deck Tie-down Turnbuckle w/ NG1 Stemball - 10mm: NGT-10S:* *Deck Tie-down Turnbuckle w/ NG1 Stemball - 12mm: NGT-12S:* *Deck Tie-down Turnbuckle w/ NG2 Stemball - 14mm: NGT-14S:* Stainless Steel Deck Tie-down Turnbuckle used with Isomat and Sparcraft Deck Collars. Tubular, Close-bodied Turnbuckle is secured with locking nuts, body features wrench flats and is marked with a line around the Left Hand end. Upper 'T' End fits all Isomat and Sparcraft Deck Collars with Turnbuckle pockets, Lower Stemball End fits various Stemball Cup Washers and Stemball Backing Shells. 10mm Turnbuckle has NG1 head, and is 290mm (11 1/2") long (when closed), and allows up to 100mm (4") adjustment. 12mm Turnbuckle has NG1 head, and is 300mm (12") long (when closed), and allows up to 125mm (5") adjustment. 14mm Turnbuckle has NG2 head, and is 330mm (13") long (when closed), and allows up to 150mm (6") adjustment.

NG1 Stemball Cup Washer - 26x13: NG1-CW13: Stemball Cup Washer is used with NG1 Deck Tie-down Turnbuckles and Stemball Backing Shells, as well as a variety of other applications. Type 316 SS Cup Washer is 26mm (>1") OD x 13mm (>1/2") ID x 11.5mm (7/16") high.
Round Stemball Backing Shell for NG1 head: RR 86-BSR-8S: Formed SS Stemball Backing Shell Tang is used with NG1 Deck Tie-down Turnbuckles and Cup Washers, as well as a variety of other applications. Mounts internally in mast cutout 2 1/2" (64mm) high x 1 5/8" (42mm) wide using (1) 1/4" (6mm) rivet. Plate is 4" (101mm) long x 1 3/4" (45mm) wide, and is contoured for use with most Mast Sections. Hole is 11/16" (18mm). Note that other Stemball Backing Shells are sometimes used with NG1 Deck Tie-down Turnbuckles, See: Stemball Backing Shells.

NG2 Stemball Cup Washer - 34x20: NG2-CW20: Standard NG2 Stemball Cup Washer is used with NG2 Deck Tie-down Turnbuckles and Stemball Backing Shells, as well as a variety of other applications. Type 316 SS Cup Washer is 34mm (>1 5/16") OD x 20mm (>3/4") ID x 11.5mm (7/16") high.
Round Stemball Backing Shell for NG2 head: RR 86-BSR-10S: Formed SS Stemball Backing Shell Tang is used with NG2 Deck Tie-down Turnbuckles and Cup Washers, as well as a variety of other applications. Mounts internally in mast cutout 3 3/16" (82mm) high x 1 1/2" (50mm) wide using (1) 1/4" (6mm) rivet. Plate is 4 3/4" (122mm) long x 1 15/16" (49mm) wide, and is contoured for use with most Mast Sections. Hole is 7/8" (22mm). Note that other Stemball Backing Shells are sometimes used with NG2 Deck Tie-down Turnbuckles, See: Stemball Backing Shells.

*Deck Tie-down Turnbuckle w/ T-Ball - 12mm: NGT-12T:* Stainless Steel Deck Tie-down Turnbuckle used with Isomat and Sparcraft Deck Collars. Tubular, Close-bodied Turnbuckle is secured with locking nuts, body features wrench flats and is marked with a line around the Left Hand end. Upper 'T' End fits all Isomat and Sparcraft Deck Collars with Turnbuckle pockets, Lower T-Ball End fits various standard T-Ball Backing Plates. 12mm Turnbuckle has 11mm T-Ball, and is 300mm (12") long (when closed), and allows up to 125mm (5") adjustment. Used only on Masts built in France.

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