SPI 34-337-6 0-80 UNF-2B Go/No-Go Thread Plug Gage

This is a new SPI double-end thread plug gage, part number 34-337-6, designed to inspect internal threads to the 0-80 UNF-2B standard. The GO member verifies that the minimum material condition of the threaded hole is met (thread must accept the GO plug), while the NOT GO member confirms the maximum material condition is not exceeded — together they ensure the tapped hole falls within the Class 2B tolerance band for 0-80 UNF threads. The gage features a black anodized aluminum handle with a relief slot for easy identification and grip, with hardened and ground steel thread members protected by a clear plastic storage cap. Cert. No. 554088 is visible on the packaging label, confirming the gage ships with a certificate of inspection; the label also indicates a specified GO pitch diameter of approximately 0.0596 in. This gage is suited for quality control inspection of precision tapped holes in aerospace, electronics, instrumentation, and any application using #0-80 miniature fasteners.

Product Specifications