A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6685-00-670-4117
NSN 5985-01-056-5179
NSN 5975-00-594-7452
NSN 6240-01-285-0927
NSN 4140-00-790-4691
NSN 5996-01-028-7726
NSN 6105-01-541-7621
NSN 5935-01-400-0514
NSN 5905-01-502-9372
NSN 6220-01-252-7965
NSN 5998-01-534-6251
NSN 5990-01-416-0362