A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5910-01-554-8441
NSN 5930-01-634-0659
NSN 2925-01-266-5229
NSN 5998-01-501-5360
NSN 6135-01-631-0269
NSN 5915-01-374-1857
NSN 6620-00-360-1379
NSN 5950-01-025-6732
NSN 6685-00-097-6263
NSN 6145-01-271-6942
NSN 7035-01-168-3596
NSN 5990-01-417-4402