M12x40mm Hex Serrated Flange Bolts 10.9 Grade Carbon Steel Screws 3 Pack

Uxcell M12x40mm Hex Serrated Flange Bolts 10.9 Grade Carbon Steel Screws 3 Pack Description: 1. Material: Made of 10.9 grade carbon steel black oxide coating finish high strength wear-resistant anti-corrosion. 2. Application: It is widely used in the assembly and maintenance of households machine tools construction and DIY project. Such as the assembly and fixing of guardrails home appliances pipeline installations equipment steel-framed houses etc. 3. Design: There is a circular serrated flange under the head of the flange bolt which acts as a gasket and has the function of distributing load and preventing loosening. 4. Installation: A wrench is required for installation. Generally with a hex nut to form a fastener device(Not in the package). It can also be used alone in components with a pre-threaded hole.