A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-463-3368
NSN 6320-01-140-9343
NSN 6320-00-164-4087
NSN 6685-00-230-4267
NSN 6620-00-736-8457
NSN 5998-01-446-6333
NSN 5835-01-391-4556
NSN 2925-01-267-1598
NSN 5990-01-116-2181
NSN 5960-01-011-6358
NSN 5855-01-515-2573
NSN 5945-01-306-0140