S-90044A230 2 1/4"-8 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 in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments, minimizing maintenance needs.
• High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
• Coarse UN threads (2 1/4"-8) offer faster installation and better performance in materials where fine threads might strip or gall.
• Large 1 3/4" hex drive allows for high torque application with standard tools, ensuring secure fastening in heavy-duty assemblies.
• Partially threaded design provides unthreaded shank for precise clamping and alignment in structural applications.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial use.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to solve critical challenges in heavy machinery, construction, and manufacturing sectors. The coarse thread (2 1/4"-8) and Class 2A thread fit ensure rapid assembly and reliable grip in soft materials or where vibration resistance is paramount. The high tensile strength (170,000 psi) and Rockwell C37 hardness prevent stripping and deformation under extreme loads, while the black-oxide surface treatment provides a durable barrier against rust and corrosion in outdoor or chemically aggressive environments. Its partially threaded configuration allows for precise joint control, making it ideal for structural steel connections, industrial equipment frames, and large-scale assembly projects requiring both strength and dimensional stability.

Specification Summary & Compliance

This socket head cap screw features a 2 1/4"-8 coarse UN thread with Class 2A tolerance for consistent fit and performance. It is manufactured in accordance with ASTM A574 specifications for alloy steel socket head cap screws, ensuring material integrity and mechanical properties. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (including SVHC as of 01/17/2023), meeting international environmental and safety standards for industrial components.