JBO Thread Plug Gauge - UNF Go-No/Go - Right Hand - 2B - 1 3/8 x 12 FMH FLH FHH S&E A&NF M&D Whether you’re removing large amounts

Whether you’re removing large amounts of material from steel components or preparing cast iron workpieces for finishing

accurate ball nose and a robust cutting edge makes it ideal for mold and die applications where detail matters and consistency counts

Precise NoGo verification for quick quality control: Quickly determine whether an external thread is out of tolerance

Reuse-friendly design: The bore can be adjusted as your parts change

helping the reamer maintain size and finish over more holes between sharpenings

JBO Thread Plug Gauge - UNF Go-No/Go - Right Hand - 2B - 1 3/8 x 12 FMH FLH FHH S&E A&NF M&D Whether you’re removing large amountsThe JBO UNF Thread Plug Gauge is a precision inspection tool designed to verify internal threads to UNF standards. Built for professionals across manufacturing, automotive, and aerospace, it helps quality teams quickly assess threaded holes and confirm conformance to the 1 3 8 x 12 UNF right hand specification. Go No Go quick conformance check: The dual ends provide an immediate pass fail indication, speeding inspections and reducing guesswork in high