Item Type: Ball Studs_x000D_ Material: Metal_x000D_ Ball Head Diameter: Approx. 10MM/0.4in_x000D_ Thread: 5/16in-18_x000D_ Fitment:_x000D_ For Tonneau Covers, Tool Boxes, RVs, Camper, Marine Shocks, Cabinets, Boats, Bed Hardware, Cars, Auto, Toy Box, Hood Struts, Chute, Vehicle Window, Trailers, Trucks, Truck Boxes, Desks, Trash Can Box and various other lift support needs 1Wide Application: Ball studs with lock nuts are fit for Tonneau Covers, Tool Boxes, RVs, Camper, Marine Shocks, Cabinets, Boats, Bed Hardware, Cars, Auto, Toy Box, Hood Struts, Chute, Vehicle Window, Trailers, Trucks, Truck Boxes, Desks, Trash Can Box and various other lift support needs. 2Suitable for Pneumatic Support Rods: 10mm ball studs are suitable for support rods, which can be used on car bonnets, boot lids, doors and other parts of the car to provide stable and reliable support. 3Standard Thread Size: The ball stud bolt is equipped with 5/16?18 threads for compatibility with many existing connections and fittings, making it easy to install and replace. 4Premium Materials: Ball studs washers kit is made from high grade material which is hardness, not easy to deform, sturdy and galvanized to ensure long and reliable use. 5Easy to Use: Ball stud with hardware with rugged construction is designed to be easy to use, so you can use it easily, which is convenient and practical for you.4 x_x000D_ _x000D_ BallStudBolts 4 x Washers 4 xNylonLockNuts