10l0l 18-8 Stainless Steel UNC Acorn Cap Nuts 5/16-18 Inch Kit (25) 15 years experience in the production of stainless steel fasteners the production of stainless steel have been added to wax treatment to prevent deadlock Anti - corrosion, anti - rust, high temperature resistance and environmental protection No burr of silver appearance Package include:25 pcs 5/16-18 Acorn Cap Nuts,1 pcs Hook Magnet (can hold up to 12 Pounds)