A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5965-00-445-1843
NSN 5998-00-186-0946
NSN 5915-01-602-8669
NSN 6130-00-424-4850
NSN 6145-00-350-9285
NSN 5998-00-520-2753
NSN 5965-01-283-5711
NSN 5965-00-090-7451
NSN 5855-01-407-3739
NSN 5975-01-653-7286
NSN 6645-01-607-7931
NSN 5925-01-584-5331