Yamawa Aluminum Hand Tap (for Insert Coil Screws) AL-HT STI 1B 1/4-28UNF 1.5P AL-HT-STI-1B-1/4-28UNF-1.5P 1 Piece

Catalog number: AL-HT-STI-1B-1/4-28UNF-1.5P Features: ● For parts made of relatively soft materials such as aluminum, this machine processes female threads to insert insert coils for the purpose of reinforcing the female thread and increasing durability. ● There are two types of chamfers: blind hole 1.5P and through hole 5P. Applications: ● Workpiece: aluminum rolled material, aluminum alloy castings, zinc alloy castings. Specifications: ● Tip: Top ● Precision: 1b ● Nominal size: UNF1/4 ● Thread length (mm): 19 ● Total length (mm): 70 ● Shank diameter (mm): 6.2 ● Square shank section (mm): 5 ● Counterbore diameter (mm): 6.68 ● Number of threads: 28 ● Surface treatment: Non-coated ● Machined thread: Unified thread ● Number of engaging threads: 1.5 ● Surface treatment: Non-coated ● Shank length (mm): 36 ● Length of square shank section (mm): 8 ● Number of grooves: 4 ● Reference outer diameter (mm): 7.528 Material/Finish: ● High-speed tool steel (HSS)