A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-01-125-9167
NSN 5975-01-013-5160
NSN 5990-01-544-4360
NSN 6320-00-831-2227
NSN 5996-00-360-5126
NSN 5985-01-469-6600
NSN 5920-01-412-1080
NSN 5935-01-644-3023
NSN 5965-01-435-6644
NSN 6150-00-439-8762
NSN 2925-01-609-8464
NSN 5935-01-117-9940