VCOIL Plug Gauge (NoGo) - UNF (STI) - Heli Coil Gauge - Right Hand - 3B - 1.3/8 x 12 Widin New and offers ISO H5 tolerance

and offers ISO H5 tolerance (-0 to +0

Geometry: Corner-radius edge engineered for clean

repeatable bore quality for production runs and precision workshops

while the right-hand cutting edge provides efficient material removal for cleaner holes

Whether upgrading a production line or tackling tight groove specs in a manual setup

VCOIL Plug Gauge (NoGo) - UNF (STI) - Heli Coil Gauge - Right Hand - 3B - 1.3/8 x 12 Widin New and offers ISO H5 toleranceIntroducing the VCOIL Plug Gauge NoGo for UNF (STI) a precise, combined go no go gauge designed for Helicoil insert applications. Built for right hand UNF threads at 1 3 8 x 12 with a 3B tolerance, it helps shops verify thread quality quickly and consistently. Combined Go No Go design: A single gauge that tests both the go condition (hand screws into the thread) and the no go condition (scrap side limits how far it can be turned). UNF (STI) thread