S-90185A110 5/16"-18 x 1" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel finish, extending service life in demanding environments
• Exceptional load-bearing capacity with 120,000 psi tensile strength for heavy-duty applications
• Prevent rotation during installation thanks to integrated square neck design
• Reliable thread engagement with fully threaded UNC coarse threads for faster assembly
• Consistent performance ensured by Grade 5 classification and Rockwell C25 hardness
• Broad compatibility with Class 2A thread fit meeting industry-standard requirements
• Regulatory compliance with RoHS 3 and REACH for international industrial use

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers critical engineering solutions for structural connections in construction, agricultural equipment, and industrial machinery. The black-oxide steel construction provides enhanced corrosion protection where environmental exposure is a concern, while the square neck prevents spinning during torque application - eliminating the need for secondary locking mechanisms. With fully threaded UNC coarse threading, installation time is reduced while maintaining superior pull-out resistance. The 120,000 psi tensile strength ensures reliable performance under dynamic loads and vibration, making it ideal for trailer assemblies, structural framing, and heavy equipment manufacturing where failure is not an option.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with 5/16"-18 UNC coarse threads and right-hand threading direction. Complies with ASME B18.5 dimensional standards and meets Grade 5 mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for global industrial distribution and use.