DC SWISS Point Tap N320-4 UNF(J)1/4-28 155323 1 piece

Catalog number: 155323 Features: ● Suitable for aluminum, aluminum alloys, magnesium alloys, etc. ● Conforms to ISO3161 standards except for the lack of roundness at the bottom of the valley, making it ideal for the aviation industry. Applications: ● For through hole machining. ● Work material: aluminum alloy, pure copper, thermoplastic plastic. Specifications: ● Precision: 3B ● Nominal size: 1/4 ● Pitch (mm): 0.907 ● Thread length (mm): 17 ● Total length (mm): 80 ● Shank diameter (mm): 7 ● Shank square section (mm): 4.9 ● Pilot hole diameter (mm): 5.55 ● Number of threads: 28 ● Number of engaging threads: 4 ● Machined thread: Unified thread ● Non-coated Material/Finish: ● High speed steel (HSS-E)