JBO Thread Ring Gauge (GO) - UNC - Right Hand - 3A - No. 5 x 40 FMH FLH FHH S&E A&NF M&D and standard dimensional tolerance

and standard dimensional tolerance

Variable index geometry: Distributes cutting edges along the flute length to reduce cutting forces and improve chip evacuation

The stub length and straight shank provide rigidity and straightforward mounting in standard toolholders

smooth holes in metal without the longer reach of jobber or chucking styles

JBO Thread Ring Gauge (GO) - UNC - Right Hand - 3A - No. 5 x 40 FMH FLH FHH S&E A&NF M&D and standard dimensional toleranceThe JBO Thread Ring Gauge (GO) for UNC threads, Right Hand, 3A, No. 5 x 40, is a precise go gauge designed to verify external thread diameters quickly and reliably. Its ideal for engineers, machinists, quality control teams, and assembly personnel who need fast, confident pass fail checks on threaded components. Crafted from hardened steel, this gauge delivers durable performance in demanding shop environments. Its wear resistant construction stands