JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6G - M21 x 1 Tapping Chucks and the family offers a

and the family offers a wide range of corner radii to suit your specific part geometry

and smoother production runs—whether you’re in a shop

91 mm bore diameter

Right-hand orientation with 6H tolerance: Specifically configured for right-hand threads and standard 6H tolerance

Long Shank for Increased Reach: The extended shank offers greater access to deep pockets and hard-to-reach areas while preserving rigidity for accurate

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6G - M21 x 1 Tapping Chucks and the family offers aThe JBO Thread Plug Gauge is a metric fine Go No Go gauge designed to verify internal threads with precision. Its built for machinists, inspectors, and assembly teams working with M21 x 1 right hand threads (6G) to quickly validate hole acceptance, even in high volume productions. The hardened steel construction delivers durable, long lasting performance in tough shop environments. Go No Go precision for metric fine threads: Quickly determine if a