Hanger Bolts

Introduction to Hanger Bolts

Hanger bolts are headless, dual-threaded fasteners uniquely designed to bridge the gap between dissimilar materials. They feature a coarse lag thread on one end for secure embedment into wood or composite structures, and a standard machine thread on the opposing end to accept a nut or threaded metal hardware. This hybrid design seamlessly transfers load paths from timber substrates to metal components, making them critical for suspension and permanent anchoring setups.

Materials and Finishes

To withstand rigorous industrial environments, hanger bolts are fabricated from an extensive array of materials, including Inconel, Monel, Low Carbon Steel, Duplex Steel, Titanium alloys, and Stainless Steel. Material grades encompass 303, 304, A2, 316, and A4.

They boast a Core Hardness of Rockwell B80 - B100 and Tensile Strengths reaching up to 74,000 psi. Protective finishes include Zinc, PTFE, Zinc Plated, Hot-Dip Galvanized, and Black Oxide to prevent oxidation in both indoor and outdoor settings.

Technical Specifications and Standards

While hanger bolts are specialized assemblies, their individual threaded sections conform strictly to established engineering specifications. They meet parameters aligned with ASME B18.6.3, ASTM F593, ISO norms, DIN norms, ASTM A193, and ASTM A307.

• Thread Formats: Incorporates a Lag Thread (One End) and a Machine Thread (Other End).
• Thread Standards: Available in Metric, UNC, UNF, BSW, and standard ISO Metric.

Common Applications and Industries

The versatile dual-thread design makes hanger bolts essential for structural bracing and utility suspensions. Common applications include:

• Wood-to-metal bolting and furniture assembly
• Suspending electrical and MEP (Mechanical, Electrical, and Plumbing) infrastructure
• Sheet Metal Components fastening
• Solar panel mounting on wooden roof trusses

Conclusion

Hanger bolts provide an efficient, robust solution for wood-to-metal fastening. By offering high tensile strength, multiple alloy configurations, and reliable dual-threaded load paths, they remain a top choice for both complex solar installations and everyday furniture construction.