S-90185A164 1/4"-20 x 2 1/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-flake coating, extending service life in harsh industrial environments
• High tensile strength of 120,000 psi ensures reliable load-bearing capacity for demanding structural applications
• Square neck design prevents rotation during installation, enabling faster assembly and improved safety
• Class 2A thread fit with UNC coarse threading provides easy engagement and vibration resistance in wood and metal
• Grade 5 classification with Rockwell C25 hardness delivers consistent performance under high-stress conditions
• Full threading along the 2-1/4" length allows for deep penetration and adjustable fastening in various materials
• Compliance with ASME B18.5 and SAE J429 standards guarantees dimensional accuracy and interchangeability

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered to address common industrial fastening challenges, particularly in construction, machinery, and transportation sectors where vibration loosening and corrosion are major concerns. The zinc-flake coated steel construction provides exceptional protection against rust and chemical exposure, while the square neck securely locks into pre-drilled holes to prevent spinning during torque application. With UNC coarse threads and Class 2A tolerance, it ensures quick installation and maintains clamp force in dynamic environments. The 120,000 psi tensile strength and Rockwell C25 hardness make it ideal for heavy-duty applications like structural framing, trailer assemblies, and agricultural equipment, where failure is not an option.

Specification Summary & Compliance

This carriage bolt features a 1/4"-20 UNC coarse thread with Class 2A fit for precise engagement, manufactured to ASME B18.5 and SAE J429 Grade 5 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global markets.