JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M12 x 1.25 End Mill Holders Left‑hand spiral flute with right‑hand

Left‑hand spiral flute with right‑hand cutting: Optimizes chip evacuation and cutting direction for smoother bores and more predictable finishes

Using this reamer helps you achieve precise hole finishes with dependable performance

20 mm nominal diameter

and efficient material removal in a compact 7 mm diameter

The long neck transition helps protect the cutting edge during deep pocketing

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M12 x 1.25 End Mill Holders Left‑hand spiral flute with right‑handThe JBO Thread Ring Gauge (GO) Metric Fine is a precision tool for verifying external thread diameters on fasteners, fittings, and machined parts. Built for metric fine threads with left hand compatibility, it helps engineers, inspectors, and buyers quickly confirm conformance to M12 x 1. 25 with a 6g tolerance, while its hardened steel construction delivers lasting durability in demanding shops. Precise metric fine thread verification (M12 x 1. 25,