Style of packing is antikeystone 2 (stays square, does not bulge up); 5 rings are required to prevent failure of effective sealing
A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 6220-01-229-5418
NSN 2925-00-714-3932
NSN 5999-01-529-0336
NSN 5985-01-525-8530
NSN 5855-00-548-4742
NSN 6130-01-058-5927
NSN 5930-00-528-1168
NSN 5998-01-415-3068
NSN 2925-01-517-3495
NSN 5905-01-655-4180
NSN 6650-01-459-3946
NSN 5905-01-146-5425