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 5925-01-274-4070
NSN 4140-00-511-7345
NSN 5965-01-065-5544
NSN 7035-00-794-0792
NSN 5905-00-479-3998
NSN 5996-00-226-5364
NSN 6135-01-512-8740
NSN 6645-01-025-1002
NSN 6135-01-142-2417
NSN 6610-01-213-9288
NSN 5965-01-440-8257
NSN 6105-00-932-3627