A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 2925-00-769-8056
NSN 5915-00-930-0904
NSN 5985-01-556-4421
NSN 5950-01-437-9051
NSN 5999-01-520-6145
NSN 5960-00-492-2502
NSN 5925-01-568-3466
NSN 5895-00-553-1810
NSN 5998-01-536-0327
NSN 5950-00-011-6982
NSN 5945-01-212-2691
NSN 5925-01-178-4078