RUGGED AND DURABLE - SG TZH Flat Head Hex Socket Cap Screws 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: 1/4-20; Thread Pitch: 0.05"; Screw Length: 1-1/2". Head Diameter: 0.507". Adjustable tightening range: 1.65"-1.89", Please check specfication by picture 2 WIDE RANGE OF APPLICATIONS - Flat Head Hex Socket Cap Screws 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 10Pcs each of bolts, Barrel Nuts. 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. 1