JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - 1/4 x 28 G durable taper

durable taper

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

Teeth: 128 (fine-pitch geometry)

Metric Fine Thread Compatibility – M40 x 1

Its DIN 8093 specification and ISO H4 tolerance (D) ensure consistent bore size and reliable results across jobs

JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - 1/4 x 28 G durable taperThe 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