Industrial M3X0.5-6H-THREAD-GAGE Go No Go Plug Gage

Hemco Industrial M3 x 0.5 6H Go/No-Go Thread Plug Gauge verifies internal threads to the M3 x 0.5 standard with a 6H tolerance. The Go end confirms the hole accepts a correctly sized thread to the lower limit, while the No-Go end should not pass beyond the upper limit, indicating the thread is within tolerance. This plug gauge is used in quality-control workflows to validate threaded holes in components that mate with M3 fasteners, such as electronics housings, compact machinery, and automotive assemblies. Designed for machinists and inspectors, it offers a quick, two-ended go/no-go check to ensure proper thread fit and help prevent misassembly in production or incoming inspection.