JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M12 x 1.25 FLH A straight shank provides stable

A straight shank provides stable guidance in hand reaming setups

finish-ready holes with minimal rework

Its straight shank ensures compatibility with many clamping and holding systems

and improves heat resistance

delivering longer tool life and steadier machining performance

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M12 x 1.25 FLH A straight shank provides stableThe 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