JBO Thread Plug Gauge - UNF Go-No/Go - Left Hand - 2B - 1 1/2 x 12 FHH The GO gauge supports faster

The GO gauge supports faster throughput

It features a left-hand spiral flute and right-hand cutting in DIN 8089 form for consistent bore sizes and reliable performance across metalworking tasks

5 mm diameter and necked geometry enables precise contouring in tight spaces

repeatable final hole size for consistent fits and reduced rework

helping maintain cutting performance in through-hole reaming

JBO Thread Plug Gauge - UNF Go-No/Go - Left Hand - 2B - 1 1/2 x 12 FHH The GO gauge supports fasterJBO Thread Plug Gauge is a precision testing tool designed to quickly verify UNF threads in holes and inserts. Specifically configured for left hand threads in a 1 1 2 x 12 size with 2B tolerance, this go no go plug gauge helps inspectors, machinists, and quality teams confirm that threaded holes meet the required Unified thread standards. Its compact, hand held form makes it a reliable companion on shop floors, assembly lines, and maintenance benches