JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M39 x 0.75 Boring Bar Blank Four-flute design for smooth cutting

Four-flute design for smooth cutting and finish: The 4-flute geometry minimizes chatter

repeatable results across a variety of metals and alloys

The two-flute geometry strikes a balance between rigidity and efficient material removal

and extends tool life in demanding jobs

and reliable results from roughing through finishing on stainless steel and exotic alloys

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M39 x 0.75 Boring Bar Blank Four-flute design for smooth cuttingThe JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. Specifically crafted for M39 x 0. 75 applications, this right hand, Go No Go gauge helps shops verify threaded holes quickly and reliably. Its ideal for machinists, assembly lines, and QA teams that need fast, accurate fits without guesswork. Made from hardened steel for exceptional durability, this plug gauge resists wear and maintains accurate measurements