The SCC NEF-3 Thread Plug Gage is a go/no-go inspection tool for internal threads sized 8-32 with the NEF-3 specification. It uses two ends to check the pitch diameter: Go PD is 0.3547 inches and No-Go PD is 0.3571 inches. The Go end should enter the thread to verify a minimum size, while the No-Go end must not pass to indicate the thread does not exceed the maximum. This gauge is used in quality control and machining environments to confirm thread form and pitch diameter tolerance in nuts, tapped holes, or other internal-thread features that require a precise fit.
