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 5965-00-067-7393
NSN 5998-01-067-8494
NSN 5996-00-770-1863
NSN 5895-01-545-4437
NSN 5910-01-094-6752
NSN 5985-00-850-1524
NSN 6135-01-465-2681
NSN 2925-01-263-9433
NSN 6130-01-285-1167
NSN 5920-00-201-4914
NSN 6130-01-024-9557
NSN 6685-01-243-0372