Item must comply with requirements of defense supply center philadelphia production standard no. Po0004nrp
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 6645-00-933-2170
NSN 6240-01-181-1187
NSN 5915-00-964-6381
NSN 7035-00-585-2113
NSN 5985-00-283-6909
NSN 5960-01-462-6267
NSN 5930-00-780-5522
NSN 6220-01-234-5200
NSN 5965-01-456-4514
NSN 5905-01-014-0178
NSN 5996-00-460-5075
NSN 6145-01-015-6934