A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5998-01-186-8961
NSN 6240-01-432-0819
NSN 5905-00-644-9983
NSN 6150-01-031-3818
NSN 6135-00-057-2005
NSN 5975-00-276-7559
NSN 4140-01-199-5196
NSN 5920-01-646-5798
NSN 6650-01-080-8012
NSN 5915-00-233-6346
NSN 5950-01-281-6568
NSN 4140-00-707-2963