JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - 1/2 x 20 S&E right-hand cutting geometry: Designed for

right-hand cutting geometry: Designed for efficient chip evacuation and a clean

Its ER32 size ensures compatibility with a wide range of chucks

this arbor supports faster setup times

4-flute design for efficient chip evacuation: Clears chips quickly to maintain steady cutting

you can trust it to deliver consistent performance in production environments and workshop setups alike

JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - 1/2 x 20 S&E right-hand cutting geometry: Designed forThe JBO Thread Ring Gauge NoGo for UNF threads is a precision inspection tool designed to verify external thread diameters with confidence. It's ideal for manufacturers, automotive shops, aerospace maintenance, and metalworking teams, helping confirm that threaded components meet Unified thread standards and will perform as intended. This NoGo gauge provides a clear pass fail indication for 1 2 x 20 left hand threads in the 2A class, enabling fast,