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 5905-01-038-3046
NSN 5930-00-431-3269
NSN 5930-01-563-8262
NSN 5910-00-736-2601
NSN 5990-01-652-7373
NSN 6645-00-137-7699
NSN 5915-01-112-4830
NSN 6620-01-435-7083
NSN 6145-01-608-8903
NSN 5950-01-244-8270
NSN 5965-00-296-9994
NSN 6150-00-276-7483