Quick Change-Threading Tools-UN Threads-Single Point

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Micro 100 QIT-120500 Threading Tool - UN - Quick Change, 20-56 TPI, 20-56 Thread Size, 136 Min Bore Dia, 1/2 Max Bore Depth, 030 Proj, 3/16 Shank Dia, 1-1/2 OAL, Uncoated:

Micro 100 IT-100350 Threading Tool - UN - Single Point, 24-56 TPI, 24-56 Thread Size, 110 Min Bore Dia, 350 Max Bore Depth, 025 Proj, 1/8 Shank Dia, 1-1/2 OAL, Uncoated: : Industrial & Scientific

Thread Milling Cutters-Single Form-UN Threads

Screw Thread Cutting –

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Multi-Start Thread Reference Guide - In The Loupe - Machinist Blog

Screw Thread Cutting –

Quick Change-Threading Tools-UN Threads-Single Point