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 6645-01-447-3143
NSN 6150-00-005-1791
NSN 7035-01-202-9250
NSN 5950-00-821-0700
NSN 6645-01-441-0937
NSN 5925-01-619-3730
NSN 5996-00-442-4472
NSN 5996-01-174-5746
NSN 6610-01-514-7755
NSN 6105-00-564-2773
NSN 5910-01-486-7023
NSN 7035-01-545-6402