Over the years I have collected quite a selection of aircraft type hardware, especially 12 point nuts. Actually, more than one man will use in a lifetime. So I have decided to package these new, surplus nuts in 10 piece lots and offer them to the public.
Locking 5/16-24 nuts. This style is steel, with a rust resistant phosphate coating. These nuts have a captive rotating washer, and are self locking. These take a 3/8” wrench, and have an overall diameter at the washer of.544 and an overall height of .326 inches. Excellent for carburetor studs. A quick pass with a tap will disengage the looking feature if desired.