JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - 1/4 x 28 G 55 mm diameter with ISO

55 mm diameter with ISO H5 tolerance (D) per DIN 212-B

and reliable results across a range of materials commonly encountered in mold and die production

square-edge precision

repeatable measurements for M11 x 1 right-hand threads

stable grip that reduces chatter and ensures consistent performance across jobs

JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - 1/4 x 28 G 55 mm diameter with ISOThe JBO Thread Ring Gauge (NoGo) is a precision tool engineered to verify external UNF threads. Specifically sized for 1 4 x 28 left hand threads in the 2A class, it helps inspectors quickly determine whether a threaded component is within tolerance or out of spec. This No Go gauge is ideal for shops and QC labs that rely on fast, reliable pass fail checks. UNF Left Hand No Go verification: Quickly confirms non conforming threads to prevent improper