Emuge L0100100.5617 Plug Thread Gage 1/4-20 Sti 2B

Product Description

The EMUGE L0100100.5617 is a double-end plug thread gage designed to inspect 1/4-20 STI (Screw Thread Insert) threads to ASME B1.2 standards. One end serves as the Go member and the other as the No Go, allowing a technician to verify both the minimum and maximum thread tolerance in a single tool. The gage is manufactured from tool steel with a bright, uncoated finish and is classified for 2B thread fits. A short-form certification is included. Weighing 0.26 pounds, the compact double-end design suits bench inspection and field verification workflows for shops, maintenance crews, and quality-control personnel.

This gage is used wherever 1/4-20 STI threaded inserts are installed and must be verified for correct thread form and fit. STI threads are common in aerospace, industrial maintenance, and repair applications where a Heli-Coil or equivalent threaded insert has been installed into a tapped hole to restore or reinforce a thread. The 2B classification covers the standard tolerance class for inch internal threads. A handle is included, sized for the standard 0 handle designation used with gages of this diameter range.

Key Features

• Double-end design with Go and No Go members in a single gage body
• Conforms to ASME B1.2 inspection standards for inch threads
• Tool steel construction for durability and dimensional stability
• Right-hand thread direction, 1/4-20 STI thread form
• Bright, uncoated finish preserves accurate thread geometry
• Short-form certification included for documentation requirements

Compatibility

Designed for inspection of 1/4-20 STI internal threads classified at 2B tolerance per ASME B1.2. Suitable for verifying threads produced by Heli-Coil or equivalent screw thread insert systems in right-hand applications.

Installation Notes

Thread plug gages are installed and removed by hand - no power tools are used. Clean the threaded hole and the gage members before inspection to prevent debris from affecting the measurement. Follow your facility or quality system's calibration and handling procedures to maintain gage accuracy. Note that this gage ships uncalibrated; calibration to a traceable standard must be performed by the user if a calibrated instrument is required.