Hexagon Machine Screw Die, National Coarse, #4 x 40

#4 x 40, national course thread, 1" hexagon machine screw die, carbon steel, ideal for routine maintenance, repair work & for rethreading where high accuracy & tolerance thread is not critical, recommended for use with hexagon die stock, die can be used with a wrench or socket when space is limited, designed for hand threading work in a variety of materials.