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 5930-01-345-5927
NSN 5950-01-565-9320
NSN 6110-00-008-4333
NSN 6240-00-143-6558
NSN 5960-00-139-3204
NSN 5915-00-296-5031
NSN 5855-01-076-5202
NSN 5910-01-576-8402
NSN 6145-00-806-8079
NSN 5960-00-014-3445
NSN 6135-00-927-5848
NSN 6645-01-164-7650