Emuge L0100100.5621 Plug Thread Gage 1/2-13 Sti 2B

Product Description

The EMUGE L0100100.5621 is a double-end plug thread gage used to verify internal thread quality on 1/2-13 STI (Screw Thread Insert) tapped holes. One end carries the Go member and the other the No Go member, allowing a technician to confirm both the minimum and maximum material conditions in a single tool. Manufactured from tool steel with a bright, uncoated finish, this gage conforms to ASME B1.2 standards for thread gaging. A short-form calibration certificate is included in the package. The handle is included and sized to fit the gage blanks as supplied. Machinists, tool-room inspectors, and maintenance technicians rely on this gage to qualify repaired or newly tapped STI threads before fastener installation.

This gage is designed for use with 1/2-13 UNC STI threads, which are commonly found in aerospace, automotive, and industrial repair applications where a Heli-Coil or equivalent wire thread insert has been installed to restore a stripped or damaged tapped hole. The right-hand thread direction and 2B tolerance class make it appropriate for standard commercial and industrial fastener applications. It is well suited to production floor inspection, incoming quality control, and field verification of threaded repairs.

Key Features

• Double-end design combines Go and No Go members in one tool for efficient thread verification
• Conforms to ASME B1.2 thread gage standards for 2B class internal threads
• Tool steel construction for durability and dimensional stability in shop environments
• Bright, uncoated finish maintains precise tolerances on gage flanks
• Sized for 1/2-13 STI threads, compatible with standard wire thread insert repairs
• Short-form certification included to support quality documentation requirements

Compatibility

Designed for inspection of 1/2-13 right-hand, 2B class STI internal threads produced using Heli-Coil or equivalent screw thread inserts in accordance with STI thread standards.

Installation Notes

Thread plug gages are inspection tools and do not require mechanical installation. Ensure the tapped hole and gage threads are clean and free of chips or cutting fluid before gaging to prevent false readings. Apply only hand pressure when using Go and No Go members - never force a gage with a wrench or pliers, as this can damage the gage and invalidate the inspection result. Gage use and storage should follow ASME B1.2 guidelines; store in a protected case away from surfaces that could cause impact damage.