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 5945-00-440-0516
NSN 7035-01-463-3368
NSN 6610-00-273-9019
NSN 5975-01-600-1697
NSN 6150-01-280-3542
NSN 4140-00-849-2930
NSN 5965-01-364-1232
NSN 5985-00-361-8863
NSN 5935-00-910-5986
NSN 5965-00-089-8308
NSN 5960-00-947-2746
NSN 5930-01-127-1718