A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-00-732-2488
NSN 5905-00-862-9754
NSN 6240-01-447-4003
NSN 7035-01-146-7096
NSN 5945-00-351-3311
NSN 5910-01-112-9210
NSN 6130-01-338-8577
NSN 6220-01-414-7789
NSN 5950-01-137-6477
NSN 6610-00-512-4183
NSN 6685-01-470-9416
NSN 5960-01-336-4239