Experience the unmatched reliability and quality of RS PRO hex nuts, designed to deliver superior performance in all your fastening applications. Made from steel with bright zinc plating which provide exceptional strength and durability, ensuring a secure hold in construction, automotive, machinery, and DIY projects. The half full nut design enables nut to be tightened up against another nut, locking the pair in place. Easy installation and removal, while the wide range of available sizes guarantees a perfect fit for fasteners and fixings.