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 6610-01-269-5437
NSN 5965-00-139-4870
NSN 5996-01-552-2502
NSN 4140-01-253-9165
NSN 2925-00-862-8550
NSN 5945-01-542-8744
NSN 6110-01-292-7823
NSN 6645-01-660-1446
NSN 4140-01-193-7705
NSN 5998-00-701-7060
NSN 5930-01-618-6807
NSN 5985-00-618-9436