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 5835-01-386-0110
NSN 6220-00-919-8172
NSN 6220-01-459-8668
NSN 6685-01-138-8406
NSN 6645-00-172-8718
NSN 5996-00-254-6355
NSN 5975-00-894-9639
NSN 5935-00-285-2767
NSN 5930-01-512-1833
NSN 6135-00-451-0709
NSN 5905-01-505-1644
NSN 5930-01-422-1702