JBO Thread Plug Gauge - UNF Go-No/Go - Left Hand - 2B - No. 12 x 28 FMH FLH FHH S&E A&NF M&D this tool is manufactured to

this tool is manufactured to order by Toolex Ltd with ISO H5 tolerance to deliver repeatable results in professional workshops

It adheres to DIN 206-B with ISO H5 tolerance to ensure consistent hole sizes and reliable interchangeability with standard gauges

The standard BS 328/4 taper shank enables quick setup and secure seating on compatible machines

2 corner radius provides improved corner stability and finish on tight radii

high-speed steel finishing tool designed for machinists who require precise bore sizes and a clean surface finish

JBO Thread Plug Gauge - UNF Go-No/Go - Left Hand - 2B - No. 12 x 28 FMH FLH FHH S&E A&NF M&D this tool is manufactured toThe JBO Thread Plug Gauge is a precision tool designed to quickly and reliably verify internal UNF threads in holes. Its ideal for manufacturing environments, automotive assembly, aerospace components, and workshop QA teams that require fast, confident pass fail checks to Unified thread standards. With its Go No Go design, inspectors can determine whether a hole is within tolerance at a glance, helping to prevent misfits and rework. Go No Go quick