A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6240-00-949-4849
NSN 5925-01-442-3792
NSN 6220-00-946-8737
NSN 6610-01-353-7075
NSN 6150-01-643-8977
NSN 5985-00-001-8462
NSN 6685-00-554-3825
NSN 5835-01-629-2044
NSN 5925-00-209-0435
NSN 5895-01-385-6111
NSN 7035-01-555-6831
NSN 6145-00-081-0299