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 5915-01-631-5555
NSN 6685-01-351-7359
NSN 6220-00-108-6452
NSN 5950-01-243-5103
NSN 5905-00-967-6324
NSN 5855-00-185-1560
NSN 5925-01-168-6090
NSN 5915-01-628-2203
NSN 5910-01-062-3369
NSN 6110-01-025-1286
NSN 5999-01-005-0321
NSN 5950-00-529-6871