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1-flute tool is built for both hobbyists and professionals who demand dependable performance in router work
ISO H5 tolerance (DIN 212‑B): Ensures precise
right-hand 6G design: Knurled handle and right-hand orientation provide secure handling and consistent results when checking internal threads in the field or on the shop floor
accurately sized holes with reliable repeatability
interchangeable hole diameters across parts and setups
JBO Thread Plug Gauge - UNF Go-No/Go - Right Hand - 2B - No. 12 x 28 FMH 1-flute tool is built forThe JBO Thread Plug Gauge is a precision internal thread gauge designed to verify UNF holes with speed and accuracy. Built for engineers, inspectors, machinists, and maintenance teams across manufacturing, automotive, and aerospace, it ensures threaded holes meet the Unified Thread Standard. It features go no go ends and a rugged knurled body for fast checks in busy workshops. Go No Go end design: Quickly determine if the internal threads pass or fail
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