JBO Thread Plug Gauge - Metric Coarse Go/No-Go - Left Hand - 6H - M39 x 4 S&E Secure set-screw seating: Locks the

Secure set-screw seating: Locks the bar firmly

Length: Extra-long length enables access to deep cavities and hard-to-reach features

standard length: Ensures reliability

Straight Shank - Spiral Flute - Stub Length - Carbide - Through Coolant - H4 - 12

this reamer helps reduce rework by producing accurate

JBO Thread Plug Gauge - Metric Coarse Go/No-Go - Left Hand - 6H - M39 x 4 S&E Secure set-screw seating: Locks theThe JBO Thread Plug Gauge is a precision inspection tool for metric coarse threads. With left hand Go No Go operation and an M39 x 4 hole size, its ideal for quality checks, assembly verification, and maintenance. Crafted from hardened steel, it stands up to daily shop use and maintains accuracy over time. Go No Go accuracy for fast inspection: Quickly verify whether a threaded hole meets spec, delivering clear pass fail results to speed up QC and