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 5910-00-941-2227
NSN 5915-00-988-0014
NSN 5910-01-469-8932
NSN 6610-01-100-3662
NSN 5910-01-378-5861
NSN 5996-01-079-3651
NSN 6685-00-309-5693
NSN 5965-01-237-3342
NSN 6610-00-144-3360
NSN 6240-01-139-3377
NSN 5920-01-290-3771
NSN 6130-00-137-7695