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 5835-01-592-2350
NSN 2925-01-219-9471
NSN 6240-00-152-2999
NSN 5960-01-573-6483
NSN 5960-00-523-9767
NSN 6240-00-919-9186
NSN 7035-01-323-0164
NSN 5910-01-418-8800
NSN 5930-01-133-1199
NSN 5996-00-422-3328
NSN 6320-01-305-5881
NSN 5930-00-621-7227