A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 7035-01-377-6255
NSN 6320-00-931-4855
NSN 5975-01-593-9380
NSN 6105-01-492-5723
NSN 6645-00-928-7208
NSN 5910-01-530-1732
NSN 5915-01-485-0850
NSN 6320-00-731-6134
NSN 6110-00-503-1105
NSN 6645-00-418-2133
NSN 5965-00-612-0072
NSN 5935-01-367-5589