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 6220-00-162-5047
NSN 2925-00-176-3889
NSN 5915-00-406-9680
NSN 5999-01-285-2124
NSN 5905-00-417-4106
NSN 6145-00-521-0001
NSN 5965-01-205-6249
NSN 6620-01-571-7727
NSN 5975-01-047-4719
NSN 5895-01-238-4239
NSN 5975-01-087-9532
NSN 5905-01-136-2727