Feature: 1. Wide 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. 2. Suitable 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. 3. Standard 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. 4. Premium 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. 5. Easy 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. Specification: .Item Type: Ball StudsMaterial: MetalBall Head Diameter: Approx. 10MM/0.4in Thread: 5/16in-18Fitment: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 Package List: 4 x Ball Stud Bolts4 x Washers4 x Nylon Lock Nuts