A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-01-229-9844
NSN 5990-00-958-8344
NSN 5960-00-233-7537
NSN 5950-01-292-1130
NSN 6220-01-044-0708
NSN 2925-00-391-0331
NSN 5945-01-466-4216
NSN 5960-01-063-6846
NSN 6610-01-196-3458
NSN 5905-01-372-3650
NSN 6320-01-347-2638
NSN 5990-00-185-9586