S-92356A159 1/4"-20 x 6 1/2" 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 long-term outdoor use.
• Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress industrial and construction loads.
• Secure anti-rotation design featuring a square neck that locks into materials, preventing bolt spin during installation and use.
• Optimized for quick assembly with coarse UNC threads and Class 2A fit, providing easy engagement and consistent clamping force.
• Enhanced durability with Rockwell B55 hardness, resisting wear and deformation in demanding applications.
• Versatile partial threading allows for effective grip length adjustment and secure fastening in various material thicknesses.
• Wide rounded head distributes load evenly, reducing surface damage and providing a finished appearance.

Professional Applications & Engineering Value

This 1/4"-20 carriage bolt is engineered to solve critical fastening challenges in industrial, automotive, and construction sectors. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for outdoor structures, machinery, and marine applications. The combination of a square neck and partially threaded UNC coarse thread design ensures the bolt remains securely locked in place, preventing loosening from vibration—a common failure point in dynamic environments. With a 70,000 psi tensile strength and Rockwell B55 hardness, it maintains integrity under heavy loads and impact, reducing maintenance needs and downtime. The wide rounded head minimizes surface marring, which is essential for applications where aesthetics and material preservation are important.

Specification Summary & Compliance

This carriage bolt meets precise dimensional and performance standards, including Class 2A thread fit for consistent assembly and UNC coarse threading (1/4"-20) for robust engagement. It is manufactured in compliance with ASME B18.5 specifications, ensuring interchangeability and reliability. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it is free of hazardous substances and safe for various industrial and consumer applications.