A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-114-6112
NSN 7035-00-329-4015
NSN 5930-01-176-5939
NSN 5935-01-025-2214
NSN 5998-01-537-9344
NSN 5960-00-481-6677
NSN 5950-01-495-6584
NSN 6620-01-441-7896
NSN 6110-01-258-1291
NSN 6145-01-570-8845
NSN 5965-00-702-7257
NSN 5915-01-237-2480