S-94050A130 1/4"-20 x 1 1/4" ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance for extended service life in harsh marine and outdoor environments
• Integrated square neck design prevents bolt rotation during installation and use for secure fastening
• Coarse UNC threading ensures quick and easy installation, even in softer materials
• Fully threaded shank provides maximum grip length and versatile application potential
• Wide, rounded carriage head offers a low-profile finish and distributes clamping force effectively
• Manufactured to ASME B18.5 standard guaranteeing dimensional consistency and interchangeability
• Compliant with RoHS 3 and REACH for safe, environmentally conscious use in regulated industries

Professional Applications & Engineering Value

This Silicon Bronze Carriage Bolt is engineered to solve critical failure points in corrosive and high-moisture applications. The square neck mechanically locks into the material, eliminating spin-out and providing reliable anti-rotation performance that is essential for structural integrity. Its corrosion-resistant properties make it an ideal marine grade fastener for boat building, docks, and coastal infrastructure, where saltwater rapidly degrades standard steel fasteners. The combination of a fully threaded UNC coarse thread and a Class 2A thread fit ensures robust holding power and ease of assembly in wood and other soft substrates, delivering a durable and long-lasting fastening solution for demanding outdoor and industrial settings.

Specification Summary & Compliance

This bolt features a 1/4"-20 UNC thread with a Coarse spacing and a Class 2A thread fit for consistent, reliable engagement. Manufacturing and dimensional specifications conform to the ASME B18.5 standard. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for hazardous substances.