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 6105-01-115-7522
NSN 6135-00-128-1633
NSN 5930-00-155-5917
NSN 6150-00-399-1431
NSN 5975-01-299-8976
NSN 5930-00-632-7094
NSN 6130-01-215-4544
NSN 5990-01-499-6930
NSN 6135-00-112-8637
NSN 6240-00-402-4481
NSN 5855-01-366-2429
NSN 6620-01-216-4901