A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5925-01-545-6829
NSN 6645-01-386-6311
NSN 5965-00-156-8562
NSN 5905-01-577-6471
NSN 6650-01-345-8174
NSN 5965-01-345-5406
NSN 5835-00-322-5654
NSN 4140-01-425-1725
NSN 6240-00-500-4404
NSN 5855-00-407-2801
NSN 5985-00-563-0883
NSN 6220-01-299-2485