S-90044A217 2"-4 1/2 x 4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure
• Black-oxide coating on alloy steel provides superior corrosion resistance and durability in demanding industrial environments
• Precision Class 2A thread fit guarantees smooth installation and secure fastening with consistent engagement
• Fully threaded right-hand UNC coarse design offers maximum grip length and faster assembly in various materials
• Rockwell C37 hardness rating maintains structural integrity under heavy loads and repeated use
• 1-1/2" hex drive with standard socket head enables high-torque installation with standard tools, improving efficiency
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global industrial applications

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws are engineered to solve critical fastening challenges in heavy machinery, construction equipment, and industrial assemblies. The combination of 170,000 psi tensile strength and Rockwell C37 hardness provides exceptional resistance to vibration loosening and structural fatigue, while the UNC coarse threads ensure rapid installation in thick materials and castings. The black-oxide surface treatment offers enhanced corrosion protection without compromising dimensional accuracy, making these fully threaded fasteners ideal for applications requiring both high clamping force and environmental durability. With their 2" diameter and 4" length, they deliver reliable performance in structural connections, equipment frames, and load-bearing assemblies where failure is not an option.

Specification Summary & Compliance

These socket head cap screws feature Class 2A thread fit with UNC coarse threading and right-hand thread direction, manufactured to ASTM A574 specifications. The inch system dimensional accuracy ensures compatibility with standard industrial components. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental safety and material responsibility for global supply chain requirements.