JBO Thread Ring Gauge (NoGo) - UNC - Right Hand - 2A - 1 1/2 x 6 End Mill Holders 50mm is an intermediate precision

50mm is an intermediate precision reamer designed to finish drilled holes to exact size with a smooth

while the left-hand spiral flute paired with right-hand cutting supports efficient chip evacuation and a clean bore

consistent hole sizes with good surface quality

predictable hole sizes suitable for engineers

this counterbore combines durability with heat resistance to deliver consistent results across a variety of materials

JBO Thread Ring Gauge (NoGo) - UNC - Right Hand - 2A - 1 1/2 x 6 End Mill Holders 50mm is an intermediate precisionThe JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external UNC threads with confidence. Ideal for manufacturing, automotive, and aerospace environments, it helps quality teams quickly confirm that fasteners and mating parts meet Unified thread standards. The NoGo design provides an immediate, visual indication of nonconforming threads, so you can trap mismatches before they proceed to assembly. Engineered for right hand UNC