A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-279-0651
NSN 5950-00-905-6257
NSN 5990-01-223-6321
NSN 5975-01-640-7125
NSN 6150-00-916-9871
NSN 5915-01-409-2926
NSN 5910-00-565-8725
NSN 5905-00-347-3926
NSN 5905-00-119-9280
NSN 6130-01-206-3582
NSN 6110-00-105-9850
NSN 5925-01-489-2791