JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - No. 1 x 64 S&E while the right-hand cutting action

while the right-hand cutting action provides stable material removal

it combines durable wear resistance with a precise ISO H5 tolerance (-0 to +0

and durable carbide supports reliable

16 mm neck length

while the robust HSS-E core maintains consistent performance across a range of metals

JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - No. 1 x 64 S&E while the right-hand cutting actionThe JBO Thread Ring Gauge (NoGo) for UNC left hand threads is a precision inspection tool designed to verify external thread diameters against Unified thread standards. Specifically configured for Left Hand UNC threads (2A) No. 1 x 64, this gauge helps quality teams and technicians quickly confirm that threaded components meet specification. Ideal for manufacturing, automotive, and aerospace environments, it supports quick, reliable go no go checks