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The JBO Thread Plug Gauge is a precision Go/No-Go tool tailored for metric fine threads
supported by the durable HSS-E (M35 cobalt) composition
this GO gauge is engineered to withstand daily shop-floor use
helping you achieve repeatable results
000 RPM and features a 69mm gauge length for stable performance across a range of tooling setups
JBO Thread Plug Gauge - UNF Go-No/Go - Left Hand - 2B - 1 1/4 x 12 Morse Taper Adaptor The JBO Thread Plug GaugeThe JBO Thread Plug Gauge is a precision go no go tool designed to verify internal UNF threads in holes and threaded features. This left hand variant is sized for 1 1 4 x 12 UNF holes and rated for 2B tolerance, providing quick, decisive checks that help ensure every part meets Unified thread standards. Its compact, easy to handle design makes it suitable for production floors, automotive service bays, aerospace maintenance, and serious hobbyist
