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 2925-01-254-3068
NSN 5975-00-960-5879
NSN 5920-01-509-7772
NSN 5930-00-226-4049
NSN 6620-01-145-7762
NSN 5998-01-089-9725
NSN 5965-00-905-6895
NSN 6240-01-367-3656
NSN 5905-01-249-6355
NSN 5915-01-518-8114
NSN 6320-00-110-8005
NSN 5965-00-242-3615