A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5855-00-167-7893
NSN 5935-01-170-0501
NSN 5895-01-472-2144
NSN 5960-01-061-2138
NSN 5990-01-411-7706
NSN 5915-00-536-3379
NSN 5905-01-082-6824
NSN 5945-00-892-1116
NSN 5985-00-916-7333
NSN 6105-01-389-8580
NSN 6105-00-324-7470
NSN 6220-00-883-5167