JBO Thread Plug Gauge - UNJF Go-No/Go - Right Hand - 3B - 3/8 x 24 Boring Bar Blank Flute design: Spiral flute for

Flute design: Spiral flute for efficient chip evacuation and smooth cutting across the bore

Extreme hardness capability for HRc70 materials: Designed to cut hardened steels and tough dies

repeatable sizing with a DIN-style tolerance ensures interchangeability and reliable results across jobs

it drops into standard toolholders for easy setup

Made of HSS-E (M35 cobalt)

JBO Thread Plug Gauge - UNJF Go-No/Go - Right Hand - 3B - 3/8 x 24 Boring Bar Blank Flute design: Spiral flute forThe JBO Thread Plug Gauge is a precision go no go tool designed to verify UNJF threads in holes and fittings. Built for right hand 3B threads in the 3 8 x 24 size, this gauge helps machinists, inspectors, and maintenance professionals quickly confirm that threaded holes conform to exact UNJF specifications. Its dual ended design provides an immediate pass fail indication, so you can move on with confidence and reduce rework. Dual ended Go No Go