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 4140-00-213-9937
NSN 6240-00-770-3372
NSN 5925-01-366-0318
NSN 5915-00-468-3911
NSN 5965-00-199-4456
NSN 5915-00-269-4463
NSN 5910-00-466-2252
NSN 5990-00-491-1338
NSN 4140-01-080-0513
NSN 5855-00-973-5717
NSN 6110-01-195-2764
NSN 5945-00-987-6940