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 6145-01-581-6020
NSN 6610-00-963-1665
NSN 6610-00-841-8221
NSN 5996-01-131-7809
NSN 5960-00-644-4982
NSN 6650-01-442-7893
NSN 6105-01-433-4232
NSN 5910-01-386-9602
NSN 5905-00-192-7246
NSN 5855-01-353-3958
NSN 6650-01-424-8048
NSN 6150-01-154-5680