Long Size Screw

Long size screws are extended-length fasteners manufactured in multiple head styles, thread types and materials to meet deep penetration and multi-layer fastening requirements. Available as drywall screws, chipboard screws, self-tapping screws and self-drilling screws in longer lengths. Designed to connect thick timber, multi-layer boards, heavy gypsum board assemblies and thick metal profiles, delivering stable pull-out resistance for heavy-duty construction and furniture projects.

Key Features

• Extended Length Options: Custom long lengths available to accommodate thick substrates and multi-layer joining.
• Multiple Head & Thread Types: Bugle head, flat head, pan head, hex washer head; coarse thread, fine thread, self-tapping and self-drilling thread options.
• High Holding Strength: Longer thread engagement provides excellent withdrawal resistance and structural stability.
• Precision Heat Treatment: Hardened steel body ensures sufficient tensile strength, reduces bending risk during driving.
• Material Selection: C1022 hardened carbon steel as standard; SS304 / SS316 stainless steel for corrosion-prone environments.
• Surface Finishes: Black phosphate, blue-white zinc, yellow zinc, Ruspert coating to match indoor and outdoor applications.

Applications

• Thick wooden beam, multi-layer plywood and heavy timber connection
• Double-layer drywall, thick partition wall and ceiling systems
• Large furniture, wooden frame and pallet assembly
• Heavy-duty light steel structure and thick sheet metal fastening Note: Choose proper head style, thread type and point according to base material. Pre-drilling is recommended for extra long screws to avoid bending.

Technical Specifications

Installation Tips

1. Use high-torque power tools for long screw driving; keep the tool straight to prevent screw bending.
2. For very thick hard wood, pre-drill pilot holes to avoid substrate cracking and screw breakage.
3. Confirm screw penetration depth to guarantee reliable clamping force.