18-8 Stainless Steel UNC Hex Bolts and Nuts, 5/16,25pcs-pack (Hex Flang Nuts(5/16-18)) 304 stainless steel 15 years experience in the production of stainless steel fasteners the production of stainless steel products 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 Flang Nuts ;1 pcs Magnetic Hook(Holds up to 12 Pounds)