Zelx SS 5/16-24 SP SS 3 Flute H5 Bottom Tap Manufacture: YMW Mfg Part Number: 384646 Size: (Inch) Thread Limit: H5 Number of Flutes: 3 Flute Style: Spiral Chamfered: Mod Bottom Thread Lead: 2-1/2 to 3-1/2 Finish/Coating: Black Oxide Tap Material: Vanadium High Speed Steel Oversize: (Yes/No) No Length of Thread: .394 Overall Length: (Inch) 2-23/32 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