IS Spiral Tap Whitworth Thread 1/4W20 SPT-1/4W20 1 piece

Catalog number: SPT-1/4W20 Features: ● Good cutting performance, chips curl upwards. ● Homo treatment retains cutting oil, reduces frictional heat generation, and prevents welding. Applications: ● For blind hole processing. ● Work material: General steel, low-medium carbon steel, alloy steel. ● Machined thread: Whitworth thread ● For blind holes. Specifications: ● Precision: H2 ● Nominal size: W1/4 ● Thread length (mm): 19 ● Total length (mm): 61 ● Shank diameter (mm): 6 ● Shank square section (mm): 4.5 ● Pilot hole diameter (mm): 5.1 ● Number of threads: 20 ● Number of engaging threads: 2.5 threads ● Machined thread: Whitworth thread ● Surface treatment: Homo treatment ● Tap grade: H grade Material/Finish: ● High speed steel (HSS-E)