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 5905-01-508-4193
NSN 5855-01-486-9924
NSN 6320-01-106-4414
NSN 5855-01-088-8700
NSN 5985-00-904-8198
NSN 6130-01-572-3336
NSN 5950-01-577-0320
NSN 6135-00-284-1406
NSN 5999-01-644-4942
NSN 6610-01-100-3662
NSN 6220-00-168-0948
NSN 5996-00-483-8348