A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5996-01-382-9710
NSN 5925-00-842-7299
NSN 5920-00-111-2375
NSN 6645-00-192-1152
NSN 6645-01-177-6021
NSN 5925-01-227-5536
NSN 6240-01-233-2334
NSN 5996-01-277-6715
NSN 6220-00-316-2500
NSN 2925-00-142-9919
NSN 5965-01-303-6105
NSN 5935-01-027-5485