A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts and accessories of military weapons of heading 9301, nesoi
NSN 6240-00-600-7138
NSN 5835-01-122-9657
NSN 7035-01-078-0155
NSN 5990-01-430-4651
NSN 5835-00-155-1379
NSN 5985-01-115-7354
NSN 5915-01-613-1294
NSN 6685-01-507-0438
NSN 5990-00-405-5182
NSN 7035-01-429-0431
NSN 5920-01-535-2003
NSN 6645-01-495-5553