A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5895-00-753-5349
NSN 5910-01-163-2463
NSN 5985-01-459-2047
NSN 6240-01-406-5345
NSN 5990-00-033-8128
NSN 5925-00-215-3758
NSN 5985-01-053-3618
NSN 6150-01-259-4633
NSN 5996-01-177-8923
NSN 5996-01-496-0462
NSN 5985-00-291-1140
NSN 5965-01-256-0059