![SPI - M39x4 No Go Single Ring Thread Gage - Class 6G, Oil Hardened Nonshrinking Steel (OHNS), NPL Traceability Certification Included - Exact Industrial Supply](http://exactindustrialsupply.com/cdn/shop/products/7589017-11_3212f779-02f1-4a98-a879-ab9ae19b6ae2_1024x1024.jpg?v=1586016386)
SPI - M39x4 No Go Single Ring Thread Gage - Class 6G, Oil Hardened Nonshrinking Steel (OHNS), NPL Traceability Certification Included
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