RUGGED AND DURABLE - SG TZH Flanged Hex Head Bolts made of high-quality 18-8(304)Stainless Steel，which has higher corrosion resistance and anti-rust effect than ordinary bolt, longer service life, not easy to damage, more solid. Product Size - Thread Diameter: M8; Thread Pitch: 1.25mm; Screw Length: 16mm. Head Diameter: 13mm. Flanged Head Diameter: 18mm. Please check specfication by picture 2 Bolt that meet ASME specifications comply - Flanged Hex Head Bolts can be widely used in the home and office appliance, communication equipments, ship assembly , the mechanical industry and small repairs around shops, garages or home furniture fasteners. VALUE PACKAGING AND EASY TO USE - Package includes 20Pcs each of bolts, Flange nuts , Flat & Lock washers INTIMATE SERVICE - SG TZH focus on customer satisfaction, if you have any questions or are not satisfied, you can contact us by email, we will solve all your problems as soon as possible.