ZELX SS 7/16-20 H3 Spiral Point Plug Tap Manufacture YMW Mfg Part Number 382620 Size (Inch) Thread Limit H3 Number of Flutes 3 Chamfered Plug Lead 3 to 5 Finish/Coating Black Oxide Material Vanadium High Speed Steel Oversize (Yes/No) No Length of Thread .866 Overall Length (Inch) 3-5/32 Thread Standard UNF Tapping Materials: Stainless Steel, Alloy Steels and Ductile Iron Tapping Stainless Steel: 12-70 SFM Tapping Alloy Steels: 10-45 SFM, Tapping Ductile Iron: 15-60 SFM