A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-527-8006
NSN 6145-01-571-7928
NSN 5990-01-377-8991
NSN 5999-01-520-4897
NSN 6650-01-579-7240
NSN 6645-01-435-8356
NSN 5855-01-602-9218
NSN 5925-01-512-0779
NSN 5915-01-537-2977
NSN 5920-01-250-3473
NSN 6105-00-933-2930
NSN 6650-01-388-2538