A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5895-00-009-1113
NSN 5930-01-379-1162
NSN 5998-00-585-3171
NSN 5996-01-199-7494
NSN 5945-01-468-8413
NSN 6650-01-655-6284
NSN 5915-01-610-2514
NSN 5915-01-322-8551
NSN 5895-01-457-4697
NSN 5915-00-895-7230
NSN 7035-01-174-7878
NSN 5975-01-018-3656