YG-1 Straight Flute Hand Tap, Square Shank, Series: T6316, Measurement System: Imperial, UNC, #4-40, Tapered Chamfer, 3 Flutes, HSS, Oxide Treated, 0.56 in Thread Length, 1.88 in Overall Length, 0.141 in Shank Dia, Material Application: Low Carbon Steels, Free Machining Carbon Steel, Medium to High Carbon Steels, Low Alloyed Steels, Free Machining Stainless Steels, Pure Aluminum, Aluminum Alloys, Aluminum Alloy Castings, Pure and Alloyed Copper, Free Machining Brass, Alloyed Brass, Zinc and Magnesium, H2 Thread Limit, Through Coolant: Yes