A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-00-263-3076
NSN 5935-01-282-7232
NSN 5996-00-870-7693
NSN 5905-01-157-9933
NSN 6650-00-768-4776
NSN 5930-01-604-1549
NSN 5945-00-284-2006
NSN 6620-00-719-7021
NSN 2925-00-233-5644
NSN 5895-01-129-5291
NSN 5935-01-319-7237
NSN 5960-01-267-6139