A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 2925-01-538-1343
NSN 5935-01-441-0772
NSN 5835-01-112-9008
NSN 5935-00-628-8533
NSN 5996-00-170-8060
NSN 5895-01-573-7124
NSN 6110-00-260-0130
NSN 6610-00-788-0134
NSN 5998-01-634-0604
NSN 6650-01-647-9482
NSN 6145-01-469-4254
NSN 5920-01-547-0716