VCOIL Plug Gauge (D/E) - UN (STI) - Heli Coil Gauge - Right Hand - 3B - 2 x 8

The VCOIL Plug Gauge (D/E) UN (STI) Helicoil Gauge is a precision dual-ended go/no-go tool designed for technicians and quality-control professionals working with UN/ STI threads and Helicoil inserts. It verifies thread conformance to ANSI/ASME standards with a simple hand-screw check.

• Dual-ended go/no-go design: Integrated go and no-go ends provide fast, one-tool thread verification.
• ANSI/ASME standard conformity: Manufactured and inspected to the relevant ANSI standards for UN/ STI threads.
• Red-ring scrap end: Scrap side is visibly marked with a red ring for quick identification during inspection.
• Hand-screw go end: Go end threads into the part by hand without applying excessive force to confirm acceptable fit.
• No-go scrapping limit: Scrap end should not thread in more than two turns by hand when testing rejection limits.
• Right-hand orientation: Configured for standard right-hand threaded parts.
• Thread class 3B: Specified tolerance class ensuring consistent measurement results.
• Reference temperature: All measurements assume a 20°C reference for parts and gauges.
• Grippy knurled body: Knurled surface provides secure handling in workshop conditions.

By delivering a clear go/no-go verdict, this gauge reduces guesswork and scrap, speeds up inspection cycles, and helps maintain consistent quality across production runs. The red-scrap marking and hand-screw usability enable quick checks without special tooling, while ANSI/ASME conformity ensures compatibility across standard inserts and fasteners. Ideal for production floors, machine shops, and QC labs working with Helicoil inserts and UN/ STI threads.