A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-01-024-1737
NSN 6110-01-346-9224
NSN 5910-01-067-9859
NSN 6145-01-188-9699
NSN 7035-01-558-6203
NSN 2925-01-033-8948
NSN 6220-01-217-6627
NSN 5835-01-013-0956
NSN 5950-00-618-8245
NSN 5915-00-171-1812
NSN 6610-01-507-4356
NSN 5990-00-879-0476