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 6130-01-526-8610
NSN 5930-01-167-9079
NSN 5915-01-633-9845
NSN 6130-00-707-7732
NSN 5935-01-022-3932
NSN 2925-01-652-9424
NSN 6645-01-608-1134
NSN 5925-01-297-1933
NSN 6105-01-460-4280
NSN 5835-00-929-6623
NSN 6610-01-252-4717
NSN 5996-01-361-5932