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 5960-01-432-6038
NSN 6145-00-147-5440
NSN 5998-00-153-9989
NSN 5999-01-370-5514
NSN 5905-01-030-1741
NSN 7035-01-655-8893
NSN 5930-01-600-7749
NSN 5998-01-474-5238
NSN 6610-01-271-7593
NSN 6320-01-448-1189
NSN 5910-01-522-1333
NSN 5996-01-372-5063