S-90665A139 10-32 x 3/4" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance provided by zinc plating protects against rust and extends service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees tight tolerances and secure fastening, minimizing loosening due to vibration and ensuring consistent assembly quality.
• Low-profile socket head design allows for installation in confined spaces while providing ample torque transfer with the 3/32" hex drive.
• Fully threaded body offers maximum grip and adjustment flexibility along the entire 3/4" length, accommodating various material thicknesses.
• High hardness rating (Rockwell C39) enhances wear resistance and durability, maintaining thread integrity through repeated use.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and global regulatory acceptance for industrial procurement.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 10-32 UNF socket head cap screws address common challenges like space constraints and vibration-induced loosening. The low-profile socket head and fine thread spacing enable secure fastening in compact assemblies, such as machinery frames, automotive components, and precision equipment. Made from zinc-plated alloy steel, they resist corrosion in humid or outdoor environments, reducing maintenance costs. The Class 3A thread fit and fully threaded design ensure uniform load distribution and prevent stripping, making them ideal for applications requiring high tensile strength and repeatable disassembly. By meeting ASTM A574 specifications, they deliver consistent performance in aerospace, manufacturing, and electronics industries.

Specification Summary & Compliance

This socket head cap screw features a 10-32 UNF fine thread with Class 3A fit for precise tolerance, a 3/4" length in the inch system, and a low-profile head with 5/16" diameter. It complies with ASTM A574 for material and manufacturing standards, and is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations.