Spars, Rigging, and Hardware for Sailboats

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T-Ball Backing Plate Tangs for Slots


Internally mounted Backing Plate Tangs for use with Gibb and other T-Ball Shroud fittings. T-Balls must be turned 90 degrees to be removed from Backing Plates. Plates are designed to fit through the mounting slot and are then fastened from the outside. As measurements vary widely, it is recommended that T-Balls be replaced only with the same type as original. In new masts Gibb T-Ball Backing Plates are recommended for their heavier construction and the greater worldwide availability of Gibb T-Balls in swage and Norseman versions.
See also T-Ball Backing Plate Tangs for Round Holes which mount in Round holes rather than slots.
 

Gibb T-Ball Backing Plate Tangs
Stainless Steel Gibb T-Ball Backing Plates for use with original Gibb/ Navtec T-Ball swage and Norseman mechanical fittings. Rubber plugs, GIB-742, are available to keep T-Balls from moving when not under load. See Rubber Retaining Plugs, below.
Please Note: Gibb also makes 'Rounded' T-Ball Swages and fittings which require different Backing Plate Tangs. Used for Larger shrouds (7/32" (6mm) and up), these Tangs mount in Round holes rather than slots. See: Gibb 'Rounded' T-Ball Backing Plate Tangs.
 
T-Ball Backing Plate for 3/32" & 1/8" wire: GIB 740-3:
SS T-Ball Backing Plate Tang for 3/32" & 1/8" (or 2mm, 2.5mm & 3mm) wire using Gibb T-ball swage fittings, #741-3, 741-4, or the #743-3 T-Ring Fitting. Mounts internally in mast cutout 5/8" (16mm) high x 3/8" (10mm) wide using (2) 3/16" (5mm) rivets on 1 3/8" (34mm) hole centers. Plate is 2" long x 9/16" wide, and is contoured for use with most Mast Sections. Slot in Plate measures 1/2" long x 9/32" wide (13x7mm). Use with GIB 742-3 Rubber Retaining Plug.
 

Gib 740-3

 

 

 

T-Ball Backing Plate w/ Screws for 3/32" & 1/8" wire: GIB 740-3MS:
As GIB 740-3, above, but unit has tapped holes for installation with 1/4" screws (included). For use where riveting is not practical.
 
T-Ball Backing Plate for 5/32" wire: GIB 740-5:
SS T-Ball Backing Plate Tang for 5/32" (4mm) wire using Gibb T-ball swage fitting #741-5, or the #743-5 T-Ring Fitting. Mounts internally in mast cutout 1 1/4" (32mm) high x 9/16" (15mm) wide using (4) 3/16" (5mm) rivets. Plate is 3 7/16" long x 1 1/16" wide, and is contoured for use with most Mast Sections. Mounting holes are 1 15/16" (49mm), and 2 7/8" (73mm) apart. Slot in Plate measures 1 1/16" long x 3/8" wide (27x10mm). Use with GIB 742-5 Rubber Retaining Plug.
 

Gib 740-5

GIB 740-5

T-Ball Backing Plate w/ Screws for 5/32" wire: GIB 740-5MS:
As GIB 740-5, above, but unit has tapped holes for installation with 1/4" screws (included). For use where riveting is not practical.
 
T-Ball Backing Plate for 3/16" wire: GIB 740-6:
SS T-Ball Backing Plate Tang for 3/16" (or 5mm) wire using Gibb T-ball swage fitting # 741-6, or the #743-6 T-Ring Fitting. Mounts internally in mast cutout 1 1/8" (29mm) high x 5/8" (16mm) wide using (2) 1/4" (6mm) rivets on 2" (50mm) hole centers. Plate is 2 5/8" long x 1" wide, and is contoured for use with most Mast Sections. Slot in Plate measures 15/16" long x 1/2" wide (24x12mm). Use with GIB 742-6 Rubber Retaining Plug.
 

Gib 740-6

 

 

 

T-Ball Backing Plate w/ Screws for 3/16" wire: GIB 740-6MS:
As GIB 740-6, above, but unit has tapped holes for installation with 5/16" screws (included). For use where riveting is not practical.
 
T-Ball Backing Plate for 7/32", 1/7", & 9/32" wire: GIB 740-7:
SS T-Ball Backing Plate Tang for 7/32", 1/4", & 9/32" (or 6mm & 7mm) wire using Gibb T-ball swage fittings, # 741-7, 741-8, 741-8, or the #743-7 T-Ring Fitting. Mounts internally in mast cutout 1 5/8" (70mm) high x 7/8" (22mm) wide using (7) 1/7" (6mm) rivets. Plate is 7 7/8" long x 1 1/2" wide, and is contoured for use with most Mast Sections. Mounting holes are 2 13/16" (71mm), and 4 1/16" (103mm) apart. Slot in Plate measures 1 5/16" long x 5/8" wide (33x16mm). Use with GIB 742-7 Rubber Retaining Plug.
 

Gib 740-7

T-Ball Backing Plate w/ Screws for 7/32", 1/4", & 9/32" wire: GIB 740-7MS:
As GIB 740-7, above, but unit has tapped holes for installation with 5/16" screws (included). For use where riveting is not practical.
 
T-Ball Backing Plate for 5/16" & 3/8" wire: GIB 740-10:
Heavy Cast SS T-Ball Backing Plate Tang for 5/16" & 3/8" (or 8mm & 10mm) wire using Gibb T-ball swage fittings, # 741-10, & 741-12. Mounts internally in mast cutout 1 7/8" (48mm) high x 1" (25mm) wide using (5) 1/4" (6mm) rivets. Plate is 5 9/16" long x 1 5/8" wide, and is contoured for use with most Mast Sections. Slot in Plate measures 1 1/2" long x 3/4" wide (38x19mm). Use with GIB 742-10 Rubber Retaining Plug.
 

 

T-Ball Backing Plate w/ Screws for 5/16" & 3/8" wire: GIB 740-10MS:
As GIB 740-10, above, but unit has tapped holes for installation with 5/16" screws (included). For use where riveting is not practical.
 

Rubber Retaining Plugs for Gibb T-Balls
T-Ball Rubber Retaining Plugs for use with Gibb T-Ball Shroud fittings. Rubber plugs keep T-Balls from moving and disengaging when not under load. Dimensions listed are for the portion of the Plug that is visible when they are installed. For replacement Retaining Plugs, measure existing Plug or slot in Backing Plate to determine which size is required. See: Gibb T-Ball Backing Plate Tangs, above.

 

Retaining Plug for T-Ball w/ 3/32", 1/8", 2mm, 2.5mm & 3mm wire: GIB 742-3:
Rubber Retaining Plug for use with Gibb T-Ball Backing Plate Tang, GIB 740-3, for 3/32" & 1/8" wire. Rubber Plug (visible when installed) is 1/2" (13mm) wide x 3/8" (10mm) high.

 

Retaining Plug for T-Ball w/ 5/32" & 7mm wire: GIB 742-5:
Rubber Retaining Plug for use with Gibb T-Ball Backing Plate Tang, GIB 740-5, for 5/32" wire. Rubber Plug (visible when installed) is 11/16" (18mm) wide x 3/4" (19mm) high.

 

Retaining Plug for T-Ball w/ 3/16" & 5mm wire: GIB 742-6:
Rubber Retaining Plug for use with Gibb T-Ball Backing Plate Tang, GIB 740-6, for 3/16" wire. Rubber Plug (visible when installed) is 11/16" (18mm) wide x 5/8" (16mm) high.

 

Retaining Plug for T-Ball w/ 7/32", 1/4", 9/32", 6mm & 7mm wire: GIB 742-7:
Rubber Retaining Plug for use with Gibb T-Ball Backing Plate Tang, GIB 740-7, for 7/32", 1/4", and 9/32" wire. Rubber Plug (visible when installed) is 15/16" (24mm) wide x 1" (25mm) high.

 

Retaining Plug for T-Ball w/ 5/16", 3/8", 8mm & 10mm wire: GIB 742-10:
Rubber Retaining Plug for use with Gibb T-Ball Backing Plate Tang, GIB 740-10, for 5/16" and 3/8" wire. Rubber Plug (visible when installed) is 15/16" (24mm) wide x 1" (25mm) high. Identical to GIB 742-7 (above), but with hard plastic insert in inboard end to increase width.

 


ACMO T-Ball Backing Plates
ACMO T-Ball Backing Plates are easily discernable from others, in that they use two (2) different sized fasteners in each fitting, and are frequently fitted with a bolt through the upper hole. These fittings are commonly found on Masts built in France. Compatible with ACMO and some other T-Ball fittings, as specified.
 
T-Ball Backing Plate Tang for 4mm wire: NGA-38-4M:
SS T-Ball Backing Plate Tang for 4mm wire using ACMO and other T-Ball fittings. Mounts internally in mast using (1) 3/16" (5mm) rivet and (2) 6mm (1/4") fasteners on 68mm (2 5/16") hole centers. Plate is 77mm long x 24mm wide (3" x 1") wide, and is contoured for use with most Mast Sections. Requires Mast cutout 24mm high x 14mm wide (1" x 9/16"). Slot in Plate measures 18x8mm (3/4" x 5/16").

 

T-Ball Backing Plate Tang for 5mm wire: NGA-38-5M:
SS T-Ball Backing Plate Tang for 5mm wire using ACMO and other T-Ball fittings. Mounts internally in mast using (1) 3/16" (5mm) rivet and (2) 6mm (1/4") fasteners on 68mm (2 5/16") hole centers. Plate is 77mm long x 24mm wide (3" x 1") wide, and is contoured for use with most Mast Sections. Requires Mast cutout 28mm high x 16mm wide (1 1/8" x 5/8"). Slot in Plate measures 23x10.5mm (7/8" x 7/16").

 

T-Ball Backing Plate Tang for 6mm wire: NGA-38-6M:
SS T-Ball Backing Plate Tang for 6mm wire using ACMO and other T-Ball fittings. Mounts internally in mast using (1) 3/16" (5mm) rivet and (2) 6mm (1/4") fasteners on 68mm (2 5/16") hole centers. Plate is 77mm long x 24mm wide (3" x 1") wide, and is contoured for use with most Mast Sections. Requires Mast cutout 32mm high x 17mm wide (1 1/4" x 11/16"). Slot in Plate measures 26x12mm (1" x <1/2").

 

T-Ball Backing Plate Tang for 7mm wire: NGA-38-7M:
SS T-Ball Backing Plate Tang for 7mm wire using ACMO and other T-Ball fittings. Mounts internally in mast using (1) 10mm bolt and (2) 1/4" rivets on 62mm (2 7/16") hole centers. Plate is 96mm long x 32mm wide (3 3/4" x 1 1/4") wide, and is contoured for use with most Mast Sections. Requires Mast cutout 42mm high x 21mm wide (1 5/8" x 13/16"). Slot in Plate measures 34x14mm (1 3/8" x 9/16").

 


Dermac/Z-Spar T-Ball Backing Plates
These lightweight T-Ball Backing Plates are the type most commonly found on Z-Spar Masts. Compatible with Dermac and other T-Ball fittings, these Backing Plates are not compatible with most sizes of Gibb T-Balls.
 
T-Ball Backing Plate Tang for 1/8" & 3mm wire: Z-3265:
SS T-Ball Backing Plate Tang for 1/8" or 3mm wire using Dermac and other T-ball fittings. Mounts internally in mast cutout 3/4" high x 5/16" wide (22x8mm), using (2) 3/16" (5mm) rivets on 1 1/2" (38mm) hole centers. Plate is 1 7/8" long x 3/4" wide (48x18mm), and is contoured for use with most Mast Sections. Slot in Plate measures 11/16" long x 5/16" wide (18x8mm).  Der BP-3

 

 
T-Ball Backing Plate Tang for 1/8", 5/32", 3mm & 4mm wire: Z-3266:
SS T-Ball Backing Plate Tang for 1/8" and 5/32" (or 3mm & 4mm) wire using Dermac and other T-ball fittings. Mounts internally in mast cutout 1" high x 9/16" wide (25x17mm), using (2) 3/16" (5mm) rivets on 2 3/16" (55mm) hole centers. Plate is 3" long x 7/8" wide (75x22mm), and is contoured for use with most Mast Sections. Slot in Plate measures 3/4" long x 11/32" wide (20x9mm). Der BP-4

 

T-Ball Backing Plate Tang for 3/16" & 5mm wire: Z-3267:
SS T-Ball Backing Plate Tang for 3/16" (or 5mm) wire using Dermac and other T-ball fittings. Mounts internally in mast cutout 1" high x 5/8" wide (25x16mm), using (2) 3/16" (5mm) rivets on 2 3/16" (55mm) hole centers. Plate is 3" long x 7/8" wide (75x22mm), and is contoured for use with most Mast Sections. Slot in Plate measures 3/4" long x 27/64" wide (20x11mm). Der BP-5

 

T-Ball Backing Plate Tang for 7/32", 1/4", 9/32", 6mm & 7mm wire: Z-3268:
SS T-Ball Backing Plate Tang for 7/32", 1/4", & 9/32" (or 6mm & 7mm) wire using Dermac and other T-ball fittings. Mounts internally in mast cutout 1 3/16" high x 3/4" wide (30x19mm), using (3) 3/16" (5mm) rivets. Plate is 4 5/16" long x 1 3/16" wide (110x30mm), and is contoured for use with most Mast Sections. Slot in Plate measures 1" long x 9/16" wide (25x14mm). Der BP-6
 

 

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