Used on tornado rb199, turbo jet engine, turbo-union ltd. flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.075" grip length
hexagon head style 0.470" grip length complete top surface of head of nut shall be powdered blasted to produce a surface finish of ra 50/80 micro" after all manufacturing operations passivate sleeve surface treated