A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6220-01-145-4993
NSN 5998-00-298-2180
NSN 6145-01-167-8366
NSN 4140-00-296-9695
NSN 4140-01-085-4965
NSN 5895-00-251-3514
NSN 6650-00-960-5040
NSN 5920-01-552-4575
NSN 6145-00-736-5919
NSN 5945-00-753-5127
NSN 5950-00-516-2436
NSN 5935-01-168-8183