A headed externally threaded fastener whose threaded portion is of one nominal diameter with an elliptical neck, directly beneath the head.
NSN 6645-01-557-4608
NSN 5835-01-193-0391
NSN 5910-00-099-9998
NSN 6145-00-826-9574
NSN 6685-01-659-2621
NSN 6650-01-323-2141
NSN 5925-01-527-4750
NSN 6685-01-437-8603
NSN 5920-01-149-4841
NSN 6240-01-045-9269
NSN 5930-01-215-6041
NSN 5905-00-922-6003