Spi 23-204-1 Truncated Taperlock Thread Plug Gage 7/8-20 Unef

Product Description

The SPI 23-204-1 is a truncated taperlock thread plug gage designed to inspect 7/8-20 UNEF external threads to Class 2A tolerance. It includes both Go and No Go members mounted on a 4-inch taperlock handle, allowing a single tool setup to confirm both minimum and maximum thread acceptance limits. The gage is machined from tool steel for dimensional stability and wear resistance under repeated use. At 1.481 pounds, the assembly is easy to handle during production floor or incoming inspection work. This gage is used by quality technicians and machinists to verify threaded components before assembly.

This gage is suited for inspecting 7/8-20 UNEF threaded parts in manufacturing, aerospace, automotive, and general machining environments where Class 2A thread tolerances must be confirmed. The truncated taperlock design allows fast member swaps on a standard taperlock handle, making it practical for high-volume inspection lines. The included 4-inch handle provides a comfortable grip and standard taper engagement for secure member retention during use.

Key Features

• Inspects 7/8-20 UNEF threads to Class 2A tolerance with Go and No Go members
• Truncated taperlock design for fast, secure member changes on standard handles
• Tool steel construction for dimensional stability and extended service life
• 4-inch taperlock handle included in the set
• Single setup confirms both acceptance and rejection limits

Compatibility

Designed for use with standard taperlock handle systems for inspecting 7/8-20 UNEF Class 2A threaded components. The truncated taperlock members are compatible with standard taperlock handles of the same size designation.

Installation Notes

Thread plug gages are handled and used by quality technicians and machinists. Ensure the taperlock member is fully seated and locked in the handle before use. Clean threads on the part being inspected and on the gage members before each check to prevent false readings or gage wear. Store gage members in a protective case when not in use to preserve calibration and surface condition.