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 5990-01-645-2592
NSN 5915-01-266-0610
NSN 5835-01-479-7908
NSN 6650-01-424-1545
NSN 6145-00-758-9884
NSN 5999-01-433-1050
NSN 5935-01-187-6444
NSN 5855-00-991-0096
NSN 5855-00-688-9954
NSN 6130-00-719-7219
NSN 5950-01-177-1312
NSN 6240-01-243-1911