Yamawa Spiral Tap for Aluminum (for Insert Coil Screws) AL-SP STI 1B M20X1.5 AL-SP-1B-STI-M20X1.5 1 Piece

Catalog number: AL-SP-1B-STI-M20X1.5 Features: ● For machining female threads to insert insert coils for the purpose of reinforcing the female thread and increasing durability in parts made of relatively soft materials such as aluminum. Applications: ● For blind hole machining. ● Workpiece materials: brass, brass castings, bronze, rolled aluminum, aluminum alloy castings, magnesium alloy castings, zinc alloy castings. Specifications: ● Precision: 1b ● Nominal size: M20 ● Pitch (mm): 1.5 ● Thread length (mm): 33 ● Total length (mm): 115 ● Shank diameter (mm): 17 ● Square shank section (mm): 13 ● Counterbore diameter (mm): 20.56 ● Number of engagement threads: 2.5 threads ● Machined thread: Metric thread ● Surface treatment: Nitriding ● Number of grooves: 4 ● Number of grooves: 4 ● Shank length: 55 mm ● Length of square shank section: 16 mm ● Reference outer diameter: 21.948 mm Material/Finish: ● High-speed tool steel (HSS)