A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-641-2830
NSN 5996-00-468-1874
NSN 6610-01-476-7412
NSN 5998-01-175-5680
NSN 6320-00-593-0379
NSN 6610-01-569-6710
NSN 5855-00-198-3197
NSN 5935-00-476-5661
NSN 5990-01-374-3877
NSN 6645-01-166-8904
NSN 5965-01-094-9759
NSN 6145-01-381-5589