A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5910-01-173-2812
NSN 6620-01-242-9247
NSN 7035-00-335-7283
NSN 6610-00-433-8700
NSN 6620-01-116-0486
NSN 5905-01-251-4365
NSN 6110-00-891-9917
NSN 6110-01-495-0771
NSN 7035-01-565-1288
NSN 6150-01-645-3706
NSN 6150-01-263-5321
NSN 5998-01-468-5747