A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5895-01-448-4115
NSN 6645-01-352-5675
NSN 6620-01-336-2663
NSN 5925-00-190-0095
NSN 4140-01-500-5924
NSN 5960-00-683-7476
NSN 5925-00-115-8114
NSN 6650-01-312-3467
NSN 4140-01-333-4929
NSN 6150-00-425-2607
NSN 4140-00-232-1039
NSN 6320-00-456-0836