A spring steel ringlike item designed to be placed between a piston ring and the piston to maintain the correct piston ring pressure against the cylinder wall.
NSN 6645-00-342-5956
NSN 6145-00-613-8489
NSN 5910-01-451-0826
NSN 6110-01-420-2118
NSN 5945-00-456-4338
NSN 6105-01-625-9636
NSN 5905-00-437-6374
NSN 5835-01-116-2369
NSN 6110-01-181-0293
NSN 6130-00-782-0353
NSN 6110-01-435-6174
NSN 5925-01-013-9650