A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-629-9361
NSN 5915-01-539-5928
NSN 5950-01-428-6782
NSN 5998-01-461-9961
NSN 6105-00-088-7615
NSN 6650-00-585-2786
NSN 5985-01-231-9272
NSN 5996-00-067-5219
NSN 5930-01-491-2590
NSN 5835-01-615-8864
NSN 5925-01-211-7745
NSN 6110-01-323-5273