A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-240-3361
NSN 5910-01-168-3838
NSN 5930-01-502-2752
NSN 6240-00-451-8587
NSN 5996-01-534-7687
NSN 6620-00-262-3113
NSN 5935-01-048-3280
NSN 5975-01-158-1061
NSN 5920-00-180-4278
NSN 5950-00-185-9588
NSN 5910-00-391-6304
NSN 5965-01-234-6844