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 5990-01-568-5565
NSN 5915-01-449-5391
NSN 6105-00-001-6807
NSN 5990-00-212-4316
NSN 6135-01-092-4734
NSN 5920-01-431-3263
NSN 7035-00-079-7189
NSN 6110-00-802-8351
NSN 5895-00-457-0571
NSN 4140-00-114-5225
NSN 6105-01-542-4117
NSN 6685-01-236-5231