S-90044A227 2 1/4"-4 1/2 x 10" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life and maintaining integrity in harsh industrial environments.
• Precise Class 2A thread fit with UNC coarse threads allows for easier assembly and disassembly, minimizing cross-threading and improving installation efficiency.
• High torque capability with the 1 3/4" hex drive and standard socket head profile provides secure engagement and prevents stripping during high-stress tightening.
• Enhanced durability from Rockwell C37 hardness offers excellent wear resistance, maintaining dimensional stability over repeated use cycles.
• Optimized for heavy-duty use with a partially threaded 10" length, providing strong clamping force where full threading isn't required, saving weight and cost.
• Compliance with international standards including ASTM A574 ensures consistent quality and reliability for critical engineering applications.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration-induced loosening and environmental degradation. The UNC coarse thread design, combined with Class 2A thread fit, ensures rapid installation and secure fastening in heavy machinery, construction equipment, and automotive assemblies where high tensile strength is paramount. The partially threaded configuration allows for precise clamping without unnecessary thread engagement, reducing stress concentrations. Ideal for applications requiring 170,000 psi tensile rating, this fastener maintains performance in high-stress environments while the black-oxide surface treatment provides an added layer of corrosion protection, extending maintenance intervals and operational lifespan in demanding sectors like mining, aerospace, and industrial manufacturing.

Specification Summary & Compliance

This product features precise Class 2A thread fit per UNC standards with a 2 1/4"-4 1/2 coarse thread and right-hand thread direction. It complies with ASTM A574 specifications for high-strength socket head cap screws, ensuring dimensional accuracy and mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for use in global markets.