JBO Thread Plug Gauge - UNF Go-No/Go - Right Hand - 2B - No. 12 x 28 FMH HSS-E cobalt substrate: Delivers longer

HSS-E cobalt substrate: Delivers longer tool life and improved wear resistance when reaming harder metals

ISO H5 tolerance (DIN 212‑B): Ensures precise

accurately sized holes with reliable repeatability

enabling quick tool changes and smoother workflow in production environments

67mm is a precision carbide-tipped reamer designed to finish holes to a tight 23

JBO Thread Plug Gauge - UNF Go-No/Go - Right Hand - 2B - No. 12 x 28 FMH HSS-E cobalt substrate: Delivers longerThe JBO Thread Plug Gauge is a precision internal thread gauge designed to verify UNF holes with speed and accuracy. Built for engineers, inspectors, machinists, and maintenance teams across manufacturing, automotive, and aerospace, it ensures threaded holes meet the Unified Thread Standard. It features go no go ends and a rugged knurled body for fast checks in busy workshops. Go No Go end design: Quickly determine if the internal threads pass or fail