JBO Thread Plug Gauge - Metric Coarse Go/No-Go - Left Hand - 6H - M30 x 3.5 ER Mini Collet Chucks delivering consistent finishes and fewer

delivering consistent finishes and fewer tool changes across mold and die projects

Manufactured with intermediate precision carbide (K10)

64mm delivers precise hole finishing to ISO H4 tolerance

controlled cutting in tight cavities and intricate contours

built for durable and accurate hole finishing

JBO Thread Plug Gauge - Metric Coarse Go/No-Go - Left Hand - 6H - M30 x 3.5 ER Mini Collet Chucks delivering consistent finishes and fewerJBO Thread Plug Gauge is a left hand, metric coarse, go no go plug gauge designed to verify M30 x 3. 5 threaded holes. Built for engineers, buyers, tradespeople, and hobbyists, it provides a fast, reliable check that ensures holes will accept components before assembly. This hardened steel gauge delivers consistent inspections and long service life in demanding workshop environments. Fast, go no go verification: Quickly confirm whether a threaded hole