Thread Forming Tap, Bottoming, Tap Style General Purpose, High Speed Steel-CO, TiCN FinishSize #4, Pitch 40, NC/UNC, Pitch Diameter Limits H5, Standard Projection -, Shank Dia. 0.141 In.For Forming Internal Threads In Aluminum, Carbon Steel, Alloy Steel, Die Steel and Stainless Steel, Tolerance 2B, ANSI Standards, 14001, Package Quantity 1 RestrictionsCalifornia Proposition 65 Warning: This product contains a chemical known to the State of California to cause cancer.