A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5945-01-437-9410
NSN 5985-01-620-6802
NSN 5965-00-136-4178
NSN 5985-01-218-0589
NSN 5910-00-533-6345
NSN 6240-01-282-0983
NSN 6240-00-044-4279
NSN 5905-01-315-3678
NSN 5915-01-437-0950
NSN 5996-01-344-9741
NSN 5915-01-264-9257
NSN 6645-00-067-7070