Left-hand spiral flute with right-hand cutting: Optimizes chip evacuation and cutting action for smoother bore finishes and more predictable hole sizes
delivering longer tool life and consistent hole size between sharpenings
it supports reliable production of mold and die components with tight tolerances
34 mm size is ideal for finish-critical holes in small-diameter components
The JBO Thread Ring Gauge (NoGo) is a precision external-thread gauge designed for metric coarse threads
JBO Thread Plug Gauge - Trapezoidal Go-No/Go - Right Hand - 7H - Tr. 11 x 2 Hex Key Drill Chuck Left-hand spiral flute with right-handThe JBO Thread Plug Gauge is a trapezoidal go no go gauge designed to verify trapezoidal internal threads quickly and accurately. Its dual ended design helps inspectors confirm thread holes meet Unified thread standards, ensuring proper fit and dependable performance in manufacturing, automotive, and aerospace environments. Whether youre an engineer, machinist, quality inspector, or buyer, this tool provides reliable, decisive results with minimal