JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M28 x 1 Hex Key Drill Chuck The intermediate precision HSS construction

The intermediate precision HSS construction delivers accurate bore diameters within ISO H5 tolerance

With an 8 mm diameter and 50 mm overall length (8 mm shank)

This reamer finishes drilled holes with consistent accuracy across tough materials thanks to its cobalt-containing HSS-E composition

it refers to blanks ready to machine into the reamer

5 left-hand threads with a 6g tolerance

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M28 x 1 Hex Key Drill Chuck The intermediate precision HSS constructionThe JBO Thread Plug Gauge is a precision tool for inspecting metric fine threaded holes. Specifically designed for right hand M28 x 1 threads with a 6H tolerance, this Go No Go gauge lets you quickly validate hole quality and ensure a proper fit in critical assemblies. Constructed from hardened steel, it resists wear and maintains accuracy through frequent use in daily production, QA labs, and maintenance workflows. This makes it a dependable choice