OSG Spiral Tap HR Coating for Ni-Based Super Heat-Resistant Alloys (for Unified Threads) 1/4 Number of Threads 28 Thread Length 16mm 3901467 WHR-NI-SFT-GH4-1/4-28UNJF 1 Piece

Catalog number: WHR-NI-SFT-GH4-1/4-28UNJF Features: ● Long life and stable machining of nickel-based alloys (40-45HRC) after aging treatment. Applications: ● For blind hole machining. ● Work material: Ni-based alloy. Specifications: ● Precision: GH4 ● Nominal size: 1/4 ● Pitch (mm): 28 ● Thread length (mm): 19 ● Overall length (mm): 62 ● Shank diameter (mm): 6 ● Shank square section (mm): 4.5 ● Pilot hole diameter (mm): 5.57 ● Number of threads: 28 ● Number of engaging threads: 2.5 threads ● Machined thread: Unified thread ● Surface treatment: HR coating Material/Finish: ● Powdered high speed steel (CPM)