A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5960-00-785-4274
NSN 5975-01-367-6547
NSN 5965-00-471-5018
NSN 6105-00-205-0655
NSN 5905-00-681-0786
NSN 5950-01-605-9089
NSN 5990-00-583-9920
NSN 5930-01-491-8783
NSN 6130-01-025-1540
NSN 5855-01-110-9564
NSN 5855-01-231-4945
NSN 6650-01-183-0711