TRUSCO Spiral Tap 1/4W20 TH-SP-1/4W20 1 piece

Catalog number: TH-SP-1/4W20 Features: ●Cutting chips curl up. ●Homo treatment retains cutting oil, reduces frictional heat generation, and prevents welding. Applications: ●For blind hole machining. ●Work material: carbon steel, copper alloy, aluminum alloy. Specifications: ●Accuracy: JIS Class 2 ●Nominal dimensions: W1/4 ●Thread length (mm): 19 ●Total length (mm): 61 ●Shank diameter (mm): 6.0 ●Shank square section (mm): 4.5 ●Pilot hole diameter (mm): 5.1 ●Number of threads: 20 ●Number of engaging threads: 2.5 threads ●Machining thread: Whitworth thread ●Surface treatment: Homo treatment ●Tap dimension: 1/4 ●Accuracy JIS Class 2 Material/Finish: ●High-speed tool steel (HSS)