JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M18 x 0.5 Morse Taper Adaptor and other high-hardness materials

and other high-hardness materials

Cutting Length: Stub-cut geometry for rigidity and precision on small-diameter workpieces

000 RPM: Precision-balanced design minimizes vibration and chatter for smooth cuts on HSK63A spindles

thanks to its HSS‑E (M35 cobalt) construction

including finishing internal corners and radii

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M18 x 0.5 Morse Taper Adaptor and other high-hardness materialsJBO Thread Plug Gauge is a precision Go No Go gauge designed for metric fine internal threads. This left hand version is tuned for M18 x 0. 5 with a 6H tolerance, making it ideal for quality critical holes in machining, assembly, and maintenance tasks. Built for real world shop use, the gauge features a knurled body for a secure grip and ends machined to exact Go No Go specifications. Crafted from hardened steel, it delivers long lasting wear