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 6320-00-931-4855
NSN 5855-01-617-1513
NSN 5920-01-281-7354
NSN 5855-01-438-4588
NSN 6220-00-595-6954
NSN 6220-00-241-8007
NSN 5950-01-358-7814
NSN 5996-01-633-7979
NSN 5965-00-468-3071
NSN 5905-01-241-7707
NSN 5925-01-229-1716
NSN 5985-01-111-0480