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 6620-01-594-1833
NSN 6685-01-377-4716
NSN 6150-01-456-9164
NSN 6320-01-259-2604
NSN 5920-01-294-5368
NSN 5999-00-323-1852
NSN 5996-00-063-4864
NSN 5950-01-583-3026
NSN 6110-01-503-5041
NSN 5925-00-554-4114
NSN 5905-00-243-9520
NSN 5950-01-076-4080