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 5985-01-128-3953
NSN 5999-00-763-8713
NSN 6220-01-512-7392
NSN 6685-00-879-2233
NSN 5910-01-084-7276
NSN 5975-00-028-0122
NSN 5960-01-424-0590
NSN 6645-01-589-8406
NSN 6320-01-359-3921
NSN 6240-00-696-0249
NSN 6110-01-151-9174
NSN 5930-01-138-8659