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 7035-00-142-9076
NSN 6685-00-120-1009
NSN 6135-00-145-8884
NSN 5925-00-393-2410
NSN 6220-01-295-7415
NSN 5998-00-596-4046
NSN 5925-01-168-3943
NSN 5999-01-312-1709
NSN 7035-01-114-3134
NSN 6320-01-032-9703
NSN 6135-01-260-7180
NSN 6240-01-250-3574