Spi 34-240-2 Plug Thread Gage 10-24 3B No Go

Product Description

The SPI 34-240-2 is a single-end No Go plug thread gage used to verify internal thread quality on 10-24 unified coarse threads to a 3B tolerance class. Machined from steel, this gage is used during inspection to confirm that a threaded hole does not exceed the maximum material condition limit. When the No Go member enters the thread, the hole fails inspection. This tool is a standard part of thread quality control in manufacturing, machining, and mechanical assembly environments. Handle is sold separately and accepts a Size 0 handle. Traceability certification to NIST standards is included with the gage.

The SPI 34-240-2 is suited for incoming inspection, in-process quality checks, and final inspection of tapped holes in metal components. The 10-24 thread size and 3B classification make this gage applicable across a wide range of light mechanical and industrial fastener applications where tolerance control of internal threads is required. It is commonly used by machinists, quality technicians, and tool-and-die professionals working to ASME B1.2 thread gage standards.

Key Features

• No Go single-end design checks maximum material condition of internal 10-24 threads
• 3B class tolerance for standard-fit unified coarse thread applications
• Steel construction for durability and dimensional stability under repeated use
• NIST traceability certification included for calibration documentation requirements
• Accepts Size 0 handle — handle not included, ordered separately
• Conforms to NIST standards for thread gage inspection

Compatibility

Designed for use in the inspection of 10-24 UNC internally threaded holes to ASME 3B class tolerance specifications. Accepts a standard Size 0 thread gage handle, sold separately.

Installation Notes

Thread plug gages are handled and used by quality control technicians and machinists — no power tools or electrical shutoff is required. Store gages in a protective case away from moisture and other metal tooling to prevent damage to the gage members. Do not force the No Go member into a hole; entry under hand pressure alone indicates a failing thread condition. Gages should be recalibrated periodically per your facility quality program to maintain NIST traceability.