VCOIL Plug Gauge (D/E) - UNF (STI) - Heli Coil Gauge - Right Hand - 2B - 9/16 x 18 Endmill25 With a 90° single-flute design

With a 90° single-flute design and cobalt-enhanced HSS

repeatable mating in production and repair tasks

The combination of left-hand spiral flutes and right-hand cutting supports steady feed and reliable chip removal

two-flute geometry for deep pockets: The long length and 2‑flute design are optimized for mold and die cavities

5 mm cutting diameter with a 7 mm long neck

VCOIL Plug Gauge (D/E) - UNF (STI) - Heli Coil Gauge - Right Hand - 2B - 9/16 x 18 Endmill25 With a 90° single-flute designVCOIL Plug Gauge (D E) is a precision go no go thread gauge designed for UNF threads and Helicoil installations. Sized for 9 16 x 18 right hand threads with a 2B tolerance, it helps quality and assembly teams quickly confirm compliant fits. Thread Form: UNF (STI) 9 16 x 18, Right Hand, 2B tolerance Gauge Type: Thread limit plug gauge (combines go and no go checks) Go End: Must screw into the thread cut by hand with minimal force to pass No Go End: