Zelx SS M8 x 1.0 Spiral Fluted SS Bottom 3 Flute Tap Manufacture: YMW Mfg Part Number: 374022 Size: (Metric) Thread Limit: D5 Number of Flutes: 3 Flute Style: Spiral Chamfered: Bottom Thread Lead: 1 to 2 Finish/Coating: Black Oxide Tap Material: Vanadium High Speed Steel Oversize: (Yes/No) No Length of Thread: .472 Overall Length: (Inch) 2-23/32 Thread Standard: UNC 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