A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5996-01-261-4262
NSN 6650-01-108-6629
NSN 6130-01-168-1627
NSN 5996-01-268-1625
NSN 5855-01-413-2213
NSN 6105-00-353-8153
NSN 5905-01-450-3400
NSN 5905-01-337-2907
NSN 5975-01-140-5806
NSN 5960-01-086-3416
NSN 5996-01-418-5140
NSN 7035-00-104-7613