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The JBO Thread Ring Gauge NoGo is a precision inspection tool built to verify external threads on metric fine specifications
enabling consistent part geometry and fewer tool changes across jobs
high-quality finishes in production or workshop settings
it fits compact tools and provides reliable performance across materials like aluminium and steel
JBO Thread Plug Gauge - UNEF Go-No/Go - Right Hand - 2B - 1 3/8 x 18 FLH Availability note: If listed asThe JBO UNEF Go No Go Thread Plug Gauge is a precision inspection tool designed to verify internal threads in holes that use UNEF 1 3 8 x 18 right hand threads. Built for reliability in manufacturing, automotive, and aerospace environments, it helps ensure threaded components meet exact specifications with fast, clear results. The go no go design lets you quickly confirm whether a hole is within tolerance, reducing guesswork and rework in QA and
