Industrial fasteners, weld nuts, hex nuts | Decker Manufacturing decker, decker manufacturing, automotive fasteners, agricultural fasteners, construction fasteners, hex nuts, weld nuts, pipe plugs, industrial fasteners The best source for high-quality hex nuts, weld nuts, pipe plugs and other industrial fasteners , Decker has been leading the industry for more than 85 years. We provide greater selection and better cost control to the automotive, agricultural and construction industries.