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 5835-00-163-1788
NSN 5990-00-269-2226
NSN 5960-01-014-1595
NSN 5985-00-959-2072
NSN 7035-01-324-3839
NSN 5930-01-157-6214
NSN 6135-01-156-4627
NSN 5905-01-469-7567
NSN 6620-00-144-3410
NSN 6135-00-837-5331
NSN 6685-00-433-2892
NSN 6645-01-252-8870