A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-053-6650
NSN 5950-01-064-8638
NSN 6645-01-548-3934
NSN 5945-01-345-1426
NSN 5975-01-425-6504
NSN 5925-01-185-5436
NSN 6150-01-018-6233
NSN 5835-00-933-9609
NSN 6620-01-258-8980
NSN 6145-01-383-7134
NSN 5925-01-222-3650
NSN 5950-01-348-5849