Zinc Plated Heavy Duty Hex Lag Wood Screws

Zinc Plated Heavy Duty Hex Lag Wood Screws are structural timber fasteners designed for heavy load wooden construction fixation. The product adopts medium carbon steel raw material with standard heat treatment process: quenching at 860℃ and tempering at 450℃, which stabilizes core hardness within 22–32 HRC and minimum tensile strength reaches 600MPa, fully matching ASTM A307 mechanical property standards. The zinc coating thickness of Zinc Plated Heavy Duty Hex Lag Wood Screws is controlled at 8–12μm, passing 72 hours neutral salt spray test under ASTM B117 testing condition, effectively avoiding rust and oxidation for outdoor wooden projects.

Core Structural & Installation Advantages

The hexagonal head of Zinc Plated Heavy Duty Hex Lag Wood Screws supports wrench and socket installation, delivering high torque without slipping. Deep sharp full thread design greatly improves pull-out resistance; taking M8×120 specification as an example, the pull-out force reaches 4.8–6.7kN when embedded 60mm into SPF lumber, which meets the load-bearing demand of outdoor decks, wooden houses and garden fences. All thread rolling procedures are finished on automatic rolling machines to ensure uniform tooth spacing and smooth penetration into solid wood, plywood and composite timber without cracking substrates. Ningbo Gangtong Zheli Fasteners Co., Ltd. strictly controls every processing link of the product to guarantee consistent dimensional tolerance for all specifications.

Application Scenarios & Quality Inspection Standard

This series fastener covers wide usage scenarios including residential wooden frame construction, landscape timber projects, wooden pallet manufacturing and outdoor terrace reinforcement. Every batch of finished Zinc Plated Heavy Duty Hex Lag Wood Screws undergoes three rounds of detection: coating thickness test, tensile shear test and salt spray anti-corrosion test, and qualified inspection reports can be provided for engineering procurement clients. For customized sizes and special surface finishes, Ningbo Gangtong Zheli Fasteners Co., Ltd. supports flexible small-batch and mass production orders, with complete size stock to shorten delivery cycle for global hardware buyers.

Purchasing & Matching Tips

Buyers can select matching specifications according to timber thickness and load-bearing requirements: thicker lumber and high-load structural positions choose longer and larger diameter sizes of the product. Users should pre-drill small pilot holes on hardwood before installing the product to prevent wood splitting. Compared with common self-tapping screws, the product owns higher shear resistance and longer service life, reducing later maintenance frequency of wooden structures, which is widely recognized by engineering contractors from Europe, Southeast Asia and North America markets.