A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6650-00-509-5248
NSN 6645-01-459-7788
NSN 5960-01-567-1096
NSN 6645-01-569-5729
NSN 5920-01-237-7854
NSN 5998-00-494-0761
NSN 7035-01-145-5059
NSN 5930-01-319-4125
NSN 5999-01-218-2720
NSN 6220-01-519-8385
NSN 5855-00-298-0261
NSN 5998-01-200-4867