A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-01-444-1732
NSN 6240-01-604-7504
NSN 5996-01-435-5547
NSN 6130-00-755-1492
NSN 5920-01-203-3915
NSN 5920-01-344-1090
NSN 6620-01-176-6956
NSN 5999-01-245-5661
NSN 5895-00-339-3014
NSN 6105-00-437-4008
NSN 5950-01-117-4992
NSN 5975-01-253-3999