A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-01-243-6998
NSN 5920-00-973-1276
NSN 6685-00-209-4400
NSN 6685-01-212-0445
NSN 6320-00-186-6452
NSN 5905-01-258-5030
NSN 6105-01-418-8708
NSN 5930-00-571-7566
NSN 7035-00-275-5604
NSN 6135-01-641-4356
NSN 6645-01-109-9552
NSN 5905-00-274-3058