A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6110-01-536-2470
NSN 5990-01-253-1332
NSN 5950-00-973-9099
NSN 6145-00-155-5297
NSN 5975-01-070-4585
NSN 4140-01-417-8070
NSN 5950-00-037-3719
NSN 5855-00-631-4565
NSN 4140-00-081-4364
NSN 5920-01-253-8261
NSN 5855-01-088-4699
NSN 5915-01-092-6838