JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M12 x 1.25 NCDC Drill Chuck and the spiral flute with

and the spiral flute with right-hand cutting balances material removal and surface finish for reliable performance across precision reaming operations

Its durable build and designed-for-purpose geometry translate to more predictable outcomes

90 mm nominal reamer size for precise bore finishing

allowing you to specify exact finishing needs while benefiting from durable HSS construction and a proven design

Tapered Neck for Rigidity and Stable Deep Grooves: The tapered neck design increases stiffness and minimizes deflection during demanding cuts

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M12 x 1.25 NCDC Drill Chuck and the spiral flute withThe JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, specifically tailored for right hand M12 x 1. 25 applications with a 4H tolerance. Its ideal for machinists, quality inspectors, and maintenance technicians who need fast, reliable checks to ensure threaded holes will accept components cleanly and consistently. Built for daily workshop use, this gauge combines a robust, hardened steel construction with a