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 6620-01-218-6203
NSN 6645-01-520-4455
NSN 5920-00-011-4512
NSN 5950-01-629-6873
NSN 5999-01-415-5090
NSN 6220-00-930-1466
NSN 6105-01-401-5361
NSN 5985-00-444-5306
NSN 5950-01-648-4516
NSN 7035-00-849-5526
NSN 5855-01-251-7721
NSN 5960-01-452-1907