High Quality 5/16-18 Bolt: You can get 25Pcs of 5/16-18 x 1 inch VGBUY button head bolts,Featured hex socket drive hole provides good torque transmission,well uniformity force,obvious screw thread with no offset,no residual burrs,the perfect partner for your work. 304 Stainless Steel:Stainless steel bolts exterior are plating of black zinc,Pass 48h salt spray test and 3 Times rust protection,superior rust resistance,excellent corrosion resistance make them more solid,great for both indoor and outdoor use. Product Size: Head Style:Button head hex socket cap,Thread Diameter: 5/16"; Thread Pitch: 1/16"; Screw Length: 1". Head Diameter: 0.537",Just insert the screw into a pre-drilled hole and turn it by wrench. Wide Range Of Application: 5/16 18 bolt is ideal for furniture fasteners,bed,kennels,desk,chair,crib,water pump,cot,communication equipment,ship assembly,light fixture,machinery industry and DIY project. Packaging& Service:5/16 18 screw comes with a thickened plastic case and hex spanner,please feel free to contact us if you have any questions about our products. VGBUY 25Pcs 5/16-18 x 1" Button Head Socket Cap Bolts Screws, 304 Stainless Steel 18-8, Allen Hex Drive,Black Zinc Plated,Fully Threaded, Hex Spanner Included