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 5945-01-568-8929
NSN 5895-00-826-6538
NSN 5905-00-501-9857
NSN 5996-00-704-7173
NSN 5950-01-394-9659
NSN 5920-01-020-1744
NSN 5960-00-517-9359
NSN 6110-00-316-3484
NSN 6135-00-334-4500
NSN 5975-00-836-9160
NSN 5990-01-632-0969
NSN 5950-00-186-9796