S-90185A174 5/16"-18 x 2 1/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in heavy-duty applications, reducing the risk of fastener failure.
• Zinc-flake coated steel construction provides superior corrosion resistance, extending service life in harsh industrial environments.
• Square neck design prevents rotation during installation and tightening, ensuring secure and stable fastening without slipping.
• Grade 5 classification guarantees consistent mechanical properties and durability for demanding engineering applications.
• Fully threaded UNC coarse thread enables quick and easy installation with excellent grip and vibration resistance.
• Rockwell C25 hardness offers balanced toughness and wear resistance, maintaining integrity under stress.
• Compliance with ASME B18.5 standards ensures dimensional accuracy and interchangeability, facilitating seamless integration into existing systems.

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered to address common industrial challenges, such as vibration loosening and corrosion-induced degradation. The zinc-flake coated steel material provides a robust barrier against moisture and chemicals, ideal for outdoor machinery, agricultural equipment, and structural assemblies. Its square neck and fully threaded UNC coarse thread design prevent rotation during torque application, ensuring a secure fit in wood, metal, and composite materials. With a tensile strength of 120,000 psi and Rockwell C25 hardness, it withstands high-stress conditions in construction, automotive, and manufacturing sectors, reducing maintenance needs and enhancing operational safety. The 2 1/4" length and right-hand thread make it versatile for various fastening tasks, delivering long-term reliability and cost savings.

Specification Summary & Compliance

This carriage bolt features precise dimensions, including a 5/16"-18 UNC thread with Class 2A fit for consistent engagement and tolerance. It adheres to ASME B18.5 manufacturing specifications, ensuring quality and compatibility. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory requirements in global markets.