JBO Thread Plug Gauge (NoGo) - Metric Fine - Left Hand - 6H - M58 x 1 Boring Bar Blank Engineered balance for high-speed accuracy:

Engineered balance for high-speed accuracy: G2

reducing the risk of oversize holes

DIN 8089 / ISO H4 tolerance: Ensures precise hole enlargement within tight ISO H4 limits for consistent results across jobs

precise interface between the holder and spindle

improving part fit and surface appearance

JBO Thread Plug Gauge (NoGo) - Metric Fine - Left Hand - 6H - M58 x 1 Boring Bar Blank Engineered balance for high-speed accuracy:The JBO Thread Plug Gauge (NoGo) Metric Fine is a precision inspection tool designed for metric fine threaded holes. Its ideal for engineers, machinists, quality teams, and workshop users who need fast, dependable checks to confirm holes meet exact size and thread standards. This NoGo gauge is tailored for left hand M58 x 1 threads with a 6H tolerance, delivering consistent results in demanding environments. Durable hardened steel construction: Built