JBO Thread Plug Gauge - UNF Go-No/Go - Right Hand - 2B - No. 12 x 28 FMH right-hand 6G design: Knurled handle

right-hand 6G design: Knurled handle and right-hand orientation provide secure handling and consistent results when checking internal threads in the field or on the shop floor

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

enabling quick tool changes and smoother workflow in production environments

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

accurately sized holes with reliable repeatability

JBO Thread Plug Gauge - UNF Go-No/Go - Right Hand - 2B - No. 12 x 28 FMH right-hand 6G design: Knurled handleThe 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