A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-01-370-4455
NSN 5925-01-381-5199
NSN 5985-01-151-7982
NSN 5960-00-968-7582
NSN 5925-00-890-4340
NSN 6150-01-216-8984
NSN 2925-01-248-6028
NSN 5925-00-132-2203
NSN 5996-01-592-5083
NSN 6220-01-456-6488
NSN 5975-01-386-5720
NSN 6135-01-648-4875