Spars, Rigging, and Hardware for Sailboats

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Stemball Cup Washers


Stainless Steel Stemball Cup Washers are used with swage and mechanical Stemball wire and Rod fittings in Mastheads, Spreader Bases and some Stemball Backing Shells. Isomat standard (metric) Cup Washers are produced in (3) basic sizes, based on maximum diameter (OD).
Cup Washers of different sizes can be nested together for use with smaller fittings in larger applications.
See also, Tangs Main Page.
 


Stemball Cup Washers
NG0 Stemball Cup Washer - 16mm OD: NG0-CW9:
Standard NG0 Stemball Cup Washer is used with swage and mechanical Stemballs for wire up to 4mm or 5/32". Type 316 SS Cup Washer is 16mm (5/8") OD x 9mm (3/8") ID x 4mm (5/32") high. os

 

 

NG0 Stemball Cup Washer - 18mm OD: NG0-CW9L:
Large NG0 Stemball Cup Washer is used with swage and mechanical Stemballs for wire up to 4mm or 5/32". Type 316 SS Cup Washer is 18mm (<3/4") OD x 9mm (3/8") ID x 8mm (5/16") high.

 

 

NG1 Stemball Cup Washer - 26x11mm: NG1-CW11:
Standard NG1 Stemball Cup Washer is used with swage and mechanical Stemballs in NG1 Mastheads, Spreader Bases and some Stemball Backing Shells. Type 316 SS Cup Washer is 26mm (>1") OD x 11mm (7/16") ID x 9.5mm (7/16") high. For use with 5/32", 3/16", 7/32", 4mm, and 5mm Standard Swage Stemballs, and 5/16", 3/8", and 7/16" threaded Stemballs. N640 -10 -13

 

NG1 Stemball Cup Washer - 26x13mm: NG1-CW13:
Standard NG1 Stemball Cup Washer is used with swage and mechanical Stemballs in NG1 Mastheads, Spreader Bases and some Stemball Backing Shells. Type 316 SS Cup Washer is 26mm (>1") OD x 13mm (>1/2") ID x 9mm (7/16") high. For use with 7/32", and 5mm Standard Swage Stemballs, and 7/16" threaded Stemballs. N640

 

 
NG1 Stemball Cup Washer - 26x16mm: NG1-CW16:
Standard NG1 Stemball Cup Washer is used with swage and mechanical Stemballs in NG1 Mastheads, Spreader Bases and some Stemball Backing Shells. Type 316 SS Cup Washer is 26mm (>1") OD x 16mm (5/8") ID x 8.5mm (7/16") high. For use with 1/4", 9/32", 6mm, and 7mm Standard Swage Stemballs, and 1/2", threaded Stemballs. N640

 


NG2 Stemball Cup Washer - 34x20mm: NG2-CW20:
Standard NG2 Stemball Cup Washer is used with swage and mechanical Stemballs in NG2 Mastheads, Spreader Bases, some Stemball Backing Shells, and in other applications. Type 316 SS Cup Washer is 34mm (>1 5/16") OD x 20mm (>3/4") ID x 9mm high. For use with 5/16", 3/8", 8mm, and 10mm Standard Swage Stemballs, and 5/8" threaded Stemballs. N640 -18

 

Stemball Cup
NG2 Stemball Cup Washer - 34x22mm: NG2-CW22:
Standard NG2 Stemball Cup Washer is used with swage and mechanical Stemballs in NG2 Mastheads, Spreader Bases, some Stemball Backing Shells, and in other applications. Type 316 SS Cup Washer is 34mm (>1 5/16") OD x 22mm (7/8") ID x 9mm high. For use with 7/16", 1/2", 11mm, and 12mm Standard Swage Stemballs, and 3/4" threaded Stemballs. os
 

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