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 5935-01-557-0951
NSN 5855-01-430-3246
NSN 4140-01-650-9116
NSN 6645-01-422-1374
NSN 5985-01-135-9780
NSN 6150-01-217-4589
NSN 6610-00-290-0758
NSN 4140-00-422-5571
NSN 5915-01-143-0937
NSN 5920-01-392-4407
NSN 6610-01-598-3036
NSN 6685-00-025-1941