S-92356A540 1/4"-20 x 3/4" ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and outdoor applications.
• Enhanced anti-rotation performance due to the integrated square neck design, preventing bolt spinning during installation and use.
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and structural integrity under stress.
• Excellent durability supported by a Rockwell B55 hardness, providing resistance to wear and deformation.
• Broad compatibility with coarse UNC 1/4"-20 threading (Class 2A fit), facilitating quick assembly and disassembly.
• Secure fastening in wood and metal with a fully threaded, right-hand design and wide, rounded carriage head for increased bearing surface.
• Compliance with industry standards including ASME B18.5, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This 1/4"-20 UNC Carriage Bolt is engineered to address common industrial challenges such as vibration loosening and material degradation. The 18-8 Stainless Steel composition offers exceptional resistance to rust and corrosion, making it suitable for applications in construction, agricultural machinery, and marine equipment where exposure to moisture is frequent. Its square neck integrates seamlessly into pre-drilled holes, locking the bolt in place to prevent rotation during torque application—a critical feature for maintaining joint integrity in dynamic loads. The coarse thread spacing and fully threaded right-hand design enable faster installation in wood and soft metals, reducing assembly time while the rounded head distributes pressure evenly, minimizing surface damage. By meeting ASME B18.5 specifications, it ensures dimensional consistency and reliability in heavy-duty fastening systems, enhancing overall engineering efficiency and safety.

Specification Summary & Compliance

This carriage bolt adheres to precise dimensional standards, including a Class 2A thread fit for consistent assembly and a UNC 1/4"-20 thread size with coarse spacing. It conforms to ASME B18.5 manufacturing specifications, ensuring high-quality production and performance. Additionally, the product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its environmental safety and suitability for global industrial use.