A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6610-00-827-8959
NSN 6685-01-519-5519
NSN 5975-01-558-9499
NSN 6240-01-340-2630
NSN 6610-01-373-3626
NSN 5950-00-779-5653
NSN 7035-01-214-5171
NSN 6145-01-369-4873
NSN 5999-01-279-9827
NSN 5985-01-170-4076
NSN 6145-01-296-1110
NSN 6620-00-511-3355