VCOIL Plug Gauge (NoGo) - Metric (STI) - Heli Coil Gauge - Right Hand - 4H - M39 x 4

Precisely engineered for helicoil and insert applications, the VCOIL Plug Gauge (NoGo) verifies M39 x 4 threads to metric STI standards. Right-handed and 4H class, it’s built for manufacturing environments that require reliable go/no-go verification of thread quality.

• Thread size and class: M39 x 4, 4H tolerance, metric (STI) standard
• Go/No-Go design: Combined go plug gauge and no-go plug gauge; go end threads into the cut by hand with controlled force; scrap side is marked with a red ring and must not thread in beyond two turns
• Standards compliance: Manufactured and assessed in accordance with ANSI/ASME thread system requirements
• Orientation: Right-hand configuration for typical helicoil and insert installations
• Grip and construction cues: Knurled body and precise threaded end for secure handling and reliable measurements
• Temperature reference: Reference temperature of 20°C for parts and gauges
• Scrap marking: Red ring on the scrap side clearly distinguishes pass/fail limits

Benefits: Use this gauge to quickly confirm thread conformity before helicoil installation or part assembly, reducing the risk of misfits and rework. The go end ensures your part will thread in by hand without excessive force, while the no-go end prevents over-tooling by stopping beyond two turns if the thread is out of spec. With ANSI/ASME-compliant dimensions, a reliable reference at 20°C, and a clear scrap indication, it supports consistent quality across production runs and QA inspections on notebooks, fixtures, and machined components alike.