A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5990-01-485-0260
NSN 5905-01-293-7759
NSN 6320-01-506-9439
NSN 5998-01-367-7394
NSN 6610-01-151-1540
NSN 5925-01-095-6397
NSN 5835-01-424-4577
NSN 6135-01-388-2761
NSN 5975-00-275-7985
NSN 6110-01-289-4689
NSN 4140-00-910-1735
NSN 6145-01-484-8735