3b thread class right-hand flat keyed head style 24 thread quantity per inch nut, plain, blind rivet, flat head shank diamer 0.250 in min, 0.254 in max
Used on marine generator mdkbd/e/f 50 - 60 hz. used on cylinder block, 100-3576-01/02, 100-3577-01/02, 100-3578/01/02; gear case assy 185-6765/6712; alternator 185-5994
Used on mrap - cougar. right-hand 20 thread quantity per inch 18-8 stainless steel hex nut assembled with tooth washer range of motion 90 degree lh or rh stopped zinc surface treated