S-90044A216 1 3/4"-5 x 10" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi for reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish, extending service life in harsh industrial environments.
• High hardness rating (Rockwell C37) ensures excellent wear resistance and durability under repeated loads.
• Precision UNC coarse threads with Class 2A fit enable quick assembly and secure fastening in coarse-grained materials.
• Large 1 1/4" hex drive provides superior torque transmission, minimizing slippage during installation.
• Partially threaded design offers optimal grip and clamping force where full threading isn't required.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global projects.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and structural integrity are paramount. The 1 3/4"-5 UNC coarse thread configuration ensures rapid installation and robust holding power in coarse-grained materials, while the high tensile strength (170,000 psi) prevents elongation and failure under extreme loads. The black-oxide surface treatment provides a protective layer against corrosion, making it suitable for outdoor or humid environments. Combined with a 1 1/4" hex drive for efficient torque application, this fastener reduces assembly time and maintenance needs, delivering long-term reliability in demanding industrial applications.

Specification Summary & Compliance

This socket head cap screw features a Class 2A thread fit for standard clearance and easy assembly, with UNC coarse threads (1 3/4"-5) ensuring compatibility with common industrial components. Manufactured to ASTM A574 specifications, it guarantees consistent material properties and dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in restricted substance-sensitive applications.