JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M20 x 1.5 ER Collet Chucks reducing tool changes and ensuring

reducing tool changes and ensuring you have the right grip for small to mid‑diameter tools

91 mm (nominal)

which translates to tighter tolerances and better surface finishes on mold interiors and die sections

making it a dependable choice for both production environments and skilled workshops

a compact 2-flute cutter designed for high-hardness materials and precise corners in tight pockets

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M20 x 1.5 ER Collet Chucks reducing tool changes and ensuringThe JBO Thread Plug Gauge is a precision Go No Go tool designed for metric fine threads. Specifically crafted for left hand hole applications, it helps you quickly verify that a threaded hole meets the exact spec for M20 x 1. 5 with a 6H tolerance. Its ideal for engineers, machinists, quality inspectors, and assembly teams who require fast, reliable checks without guesswork. Constructed for durability in busy workshops, this gauge uses hardened steel