APPLY TO - Barrel nuts and flat head screws used for assembly, connecting various components like screws, nuts, and bolts. They ensure stability by connecting furniture frames, supports, and structures.ADVANTAGE - Furniture Joint Connector Bolt & Cap Nut Kit in Different Environments; including furniture assemblies like beds, tables, cabinets, and chairs; woodworking projects involving joining wood, boards, workbenches, and kitchen countertops; as well as office appliances, 3D printing, bicycles, Photo Album, Leather, Crafting, etc.INSTALLATION -Insert the screw into the hole on one end and insert the nuts to cover the screw on the other end. Lastly, use the to tighten the bolts nuts.DESIGN - Choose Carbon Steel Fasteners for: Flat head Hexagonal socket head type, uniform force that is not easy to slip, easy to use by normal hex keys, T-shaped hex keys, and electric screwdrivers. Suitable for replacing old bolts at any time.Barrel Nuts and Flat Head Screws Note - Before making a purchase, please confirm the correct size needed. Using a caliper for measurement is recommended, and try to avoid using a ruler or tape measure.