S-90185A740 1/2"-13 x 6" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance thanks to the integrated square neck that locks securely into materials, preventing loosening under vibration and stress.
• High tensile strength of 120,000 psi ensures reliable load-bearing capacity and structural integrity for demanding applications.
• Enhanced corrosion resistance from the zinc-plated steel construction, extending service life in various environmental conditions.
• Easy and secure installation with fully threaded UNC coarse thread design, allowing for deep engagement and faster assembly.
• Consistent quality and interchangeability guaranteed by adherence to ASME B18.5 and SAE J429 standards for dimensional accuracy.
• Durable rounded head design provides a smooth, finished appearance and reduces risk of snagging in machinery or equipment.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address critical challenges in industrial fastening, such as joint failure due to vibration and corrosion. The square neck design effectively counters rotation during torque application, making it ideal for structural connections in wood-to-metal assemblies, construction frameworks, and heavy machinery where anti-rotation is paramount. Its fully threaded UNC coarse thread ensures maximum grip and load distribution, while the zinc plating provides a protective barrier against rust, enhancing longevity in outdoor or humid environments. With a Rockwell C25 hardness and high tensile strength, it withstands extreme forces, reducing maintenance needs and downtime in industrial applications like agricultural equipment, trailer manufacturing, and infrastructure projects.

Specification Summary & Compliance

This carriage bolt features precise dimensions including a 1/2"-13 UNC coarse thread with Class 2A fit for consistent assembly, a square neck for anti-rotation, and a rounded head profile. It conforms to ASME B18.5 and SAE J429 standards, ensuring reliable performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use.