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 5950-00-167-4026
NSN 5985-00-057-3497
NSN 6110-01-467-9074
NSN 6105-01-265-2730
NSN 6650-01-596-6842
NSN 5905-00-954-8929
NSN 6105-00-677-0593
NSN 5925-00-539-8372
NSN 5925-00-852-7809
NSN 5960-01-609-6565
NSN 6645-00-160-0503
NSN 6240-00-079-0112