A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6320-00-578-6898
NSN 5930-01-272-8234
NSN 6130-01-634-0603
NSN 6685-00-483-2982
NSN 6645-00-057-3499
NSN 6130-01-387-6824
NSN 5965-01-441-8826
NSN 6145-01-593-1225
NSN 5935-00-172-5870
NSN 5905-00-103-9390
NSN 7035-01-462-5766
NSN 5998-01-157-9353