JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M18 x 1 M&D 3-flute design uses a double-core

3-flute design uses a double-core construction and a variable helix to optimize chip handling and stability

and precision fabrication projects alike

while the strict tolerance and taper shank design promote repeatable results and easier setup

Material: Carbide construction delivers rigidity and consistent precision

47 mm bore sizes

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M18 x 1 M&D 3-flute design uses a double-coreThe JBO Thread Plug Gauge is a precision tool for inspecting metric fine threaded holes. It is specifically designed for left hand M18 x 1 threads and aligns with the 6H internal thread tolerance, helping you verify parts fit exactly. Go No Go Design for Fast Tolerance Checks: Quickly determine if a hole is within spec with simple go no go checks, reducing guesswork and rework. Metric Fine Thread Focused (M18 x 1 Left Hand): Precisely engineered for