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 6645-01-500-0827
NSN 5996-00-139-9140
NSN 5975-00-520-2906
NSN 5905-01-574-7015
NSN 5975-00-549-9431
NSN 5910-01-512-8201
NSN 5965-01-542-8510
NSN 5895-01-264-2271
NSN 2925-01-565-6410
NSN 5999-00-571-4187
NSN 5915-01-574-6481
NSN 6105-00-411-0306