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 6685-00-342-9408
NSN 5930-00-255-2223
NSN 6620-00-269-8950
NSN 6645-00-641-3202
NSN 5905-01-588-0610
NSN 5950-00-394-1546
NSN 6650-01-157-1667
NSN 6105-01-492-8957
NSN 5998-00-406-0429
NSN 6130-01-472-7454
NSN 4140-01-279-0556
NSN 6130-01-238-6948