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 6135-01-584-0941
NSN 6130-01-342-1865
NSN 2925-00-221-4977
NSN 5985-01-514-0741
NSN 5965-01-476-8539
NSN 6220-00-595-6954
NSN 5999-01-155-9720
NSN 6130-01-250-5144
NSN 6645-00-547-4388
NSN 5975-01-214-3091
NSN 5855-01-580-1520
NSN 6240-01-067-6457