S-90185A135 7/16"-14 x 3" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by the black-oxide steel finish, extending service life in various environments
• Secure anti-rotation installation enabled by the square neck design that prevents spinning during tightening
• Optimized thread engagement with Class 2A thread fit and coarse UNC threading for faster assembly and reduced cross-threading risk
• Enhanced surface durability with Rockwell C25 hardness that maintains structural integrity under repeated stress
• Wide head distribution creates larger bearing surface to prevent pull-through in softer materials
• Full threading versatility allows for maximum adjustability and secure fastening across the entire bolt length

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The black-oxide steel construction provides essential corrosion protection for outdoor equipment, agricultural machinery, and construction applications exposed to environmental elements. The combination of coarse UNC threading and Class 2A thread fit ensures rapid installation in wood-to-metal and structural steel connections while maintaining precise tolerances. The square neck design eliminates the need for secondary locking mechanisms in timber framing, trailer assemblies, and heavy equipment manufacturing, significantly reducing installation time and improving workplace safety. The fully threaded configuration offers flexibility in accommodating various material thicknesses while the wide rounded head provides superior clamping force distribution without surface damage.

Specification Summary & Compliance

This industrial fastener maintains Class 2A thread fit tolerances with 7/16"-14 UNC coarse threading and right-hand thread direction. Manufactured to ASME B18.5 dimensional specifications and meeting SAE J429 Grade 5 mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The bolt features a 0.45" square neck with 0.25" length for positive locking and a 0.969" diameter rounded head for optimal load distribution.