A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 2925-01-553-0181
NSN 5999-00-150-8792
NSN 5975-00-216-4848
NSN 5935-00-722-3192
NSN 5950-01-398-9557
NSN 6650-01-065-1704
NSN 6610-01-157-0426
NSN 5950-01-416-6057
NSN 6650-01-012-3290
NSN 5910-00-840-3340
NSN 5930-01-242-9918
NSN 5915-01-117-0733