S-90044A234 2 1/2"-4 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 prolongs service life in harsh industrial environments, minimizing maintenance and replacement costs.
• Precise Class 2A thread fit with UNC coarse threads allows for easier assembly and disassembly, saving time and labor during installation and maintenance.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive performance over repeated use.
• Large 1 3/4" hex drive offers secure tool engagement and high torque transmission, preventing stripping and ensuring tight, vibration-resistant connections.
• Partially threaded design optimizes grip and clamping force distribution, ideal for applications requiring precise unthreaded shank sections.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting strict industry and regulatory standards.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy machinery, construction, and industrial equipment assembly. Its 2 1/2"-4 UNC coarse threads and Class 2A fit ensure quick, reliable fastening in high-vibration environments, reducing loosening risks. The partially threaded rod type allows for controlled clamping in structural joints, while the 10" length and robust socket head profile facilitate access in confined spaces. With a 170,000 psi tensile strength and Rockwell C37 hardness, it withstands dynamic loads and abrasion, making it ideal for securing large components in manufacturing, mining, and transportation sectors where durability and precision are paramount.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit for consistent assembly tolerance and features 2 1/2"-4 UNC coarse threads with a minimum thread length of 6 1/4". Manufactured in accordance with ASTM A574 specifications, it ensures high-strength performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for industrial use without hazardous substances.