A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-01-416-9385
NSN 5996-00-891-2317
NSN 6620-01-304-1761
NSN 4140-01-152-0634
NSN 5925-01-216-0287
NSN 6105-01-023-1611
NSN 6150-00-061-3106
NSN 6220-01-202-6792
NSN 5945-00-605-4151
NSN 5985-01-450-1018
NSN 5999-01-421-1811
NSN 5930-00-477-3086