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 6650-01-629-9480
NSN 6645-00-761-7256
NSN 5945-00-733-9350
NSN 5855-01-184-8089
NSN 5998-01-274-5823
NSN 5985-00-636-8689
NSN 6320-01-296-3181
NSN 5910-01-100-1161
NSN 6620-01-095-8937
NSN 5945-01-378-5654
NSN 4140-01-093-9728
NSN 5998-00-474-7699