Profile: Resisitant Metal Alloys LLP. is a supplier of fasteners in all types and sizes. we produce small washers to large bolts as per standards & customized drawings. Cheese Head Screws are a type of fastener, in some ways similar to a bolt, typically made of metal, and characterized by a helical ridge, known as a male external thread. Cheese Head Screws are used to fasten materials by digging in and wedging into a material when turned, while the thread cuts grooves in the fastened material that may help pull fastened materials together and prevent pull-out.