JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M18 x 0.75 Endmill25 and optimal sealing requires round-shank

and optimal sealing requires round-shank tooling with no clamping flats for reliable

39 mm nominal size

smooth holes with tight tolerances for reliable fits

and maintains consistent results across intricate geometries

small-diameter bore work

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M18 x 0.75 Endmill25 and optimal sealing requires round-shankThe JBO Thread Ring Gauge (GO) Metric Fine Left Hand 6g M18 x 0. 75 is a precision tool designed to verify external thread diameters against the GO size for metric fine threads. It's ideal for quality control, inspection technicians, and shop floors where fast, reliable checks are essential to confirm parts conform to the M18 x 0. 75 left hand thread standard. The gauge is crafted for durability and long service life, making it suitable for demanding