A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6240-01-479-4476
NSN 6645-00-754-4108
NSN 5999-01-112-1015
NSN 6135-00-921-6487
NSN 2925-00-896-7318
NSN 2925-01-299-6967
NSN 4140-00-146-1633
NSN 5930-01-092-6182
NSN 6620-01-248-0358
NSN 5925-01-010-2925
NSN 5975-00-356-3394
NSN 6130-01-485-0226