To guarantee Sockets items of the highest caliber, we go above and beyond industry expectations with rigorous quality control practices. For example, all fasteners and hardware parts are strictly sourced from leading manufacturers that we have vetted, such as Holo-Krome and others. Furthermore, countless listings are inspected and tested for fit, form, and function, and our strict NO CHINA SOURCING pledge ensures that everything ships out alongside any qualifying certifications or manufacturing trace documentation. Coupled with other various dedications, we proudly conduct operations with AS9120B, ISO 9001:2015, and FAA AC 00-56B accreditation. Kick off procurement today for part number 75372 and other M42-4.5 X 280mm Iso 4762/Din 912 Black Oxide Finish Alloy Steel Socket Cap Screw Holo-Krome® Usa items of interest, and see how we at Unlimited Fasteners can serve you.