A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5905-01-415-2474
NSN 5960-01-297-2665
NSN 7035-00-193-2269
NSN 6145-00-505-7555
NSN 6110-01-509-1916
NSN 6110-00-333-9100
NSN 6150-01-286-2737
NSN 5985-00-661-2263
NSN 5960-01-301-3315
NSN 5910-01-604-8620
NSN 5925-01-049-7835
NSN 5925-01-595-6276