VCOIL Plug Gauge (D/E) - UNF (STI) - Heli Coil Gauge - Right Hand - 2B - 1/2 x 20 FMH {DIN standard}: DIN 206-B

{DIN standard}: DIN 206-B

Left‑hand spiral flute with right‑hand cutting: enables controlled material removal and stable cutting action for accurate hole sizes

Hardened steel construction for lasting durability: Resists wear in demanding inspection cycles

it tests threaded holes to confirm they accept an M4 x 0

Left-hand spiral flute with right-hand cutting: Promotes efficient chip evacuation and predictable cutting action

VCOIL Plug Gauge (D/E) - UNF (STI) - Heli Coil Gauge - Right Hand - 2B - 1/2 x 20 FMH {DIN standard}: DIN 206-BPrecision thread gauge for UNF (1 2 x 20) right hand threads, designed for Helicoil installations and quality control. The VCOIL Plug Gauge (D E) complies with ANSI ASME threading standards and provides a clear go no go assessment in a compact, hand friendly tool. Thread specification: UNF (STI), 1 2 x 20, Right Hand, 2B tolerance, tailored for Helicoil gauge checks. Go No Go design: A combined go end (hand screws into the thread) and no go scrap end;