JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M12 x 1.25 FLH and supports consistent results from

and supports consistent results from one pass to the next

reducing downtime and boosting overall productivity in shops

finish-ready holes with minimal rework

machinists and hobbyists who need reliable

this reamer helps you achieve precise bore sizes on the first pass

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M12 x 1.25 FLH and supports consistent results fromThe JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It helps machinists, engineers, quality inspectors, and maintenance teams quickly verify threaded holes meet the M12 x 1. 25 fine thread standard, ensuring reliable mating with fasteners. This left hand gauge is built for durability and accuracy in demanding assemblies, conforming to the 6H tolerance to ensure proper fit and predictable performance. Go No Go