S-90044A151 3/8"-16 x 4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi provides superior resistance to breaking under extreme loads, ensuring long-term reliability in high-stress applications.
• Precision Class 3A thread fit guarantees tight, secure fastening with minimal backlash, reducing the risk of loosening in vibrating environments.
• Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial conditions.
• Fully threaded UNC coarse design allows for maximum grip and holding power across the entire length, ideal for demanding assembly and machinery.
• High hardness (Rockwell C37) ensures excellent wear resistance, maintaining thread integrity and drive performance through repeated use.
• 5/16" hex drive compatibility enables easy installation and removal with standard tools, improving efficiency in maintenance and production.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety, meeting rigorous industry standards for global supply chains.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial use, this Black-Oxide Alloy Steel Socket Head Cap Screw addresses critical challenges in machinery, automotive, and construction sectors. The UNC coarse threading with Class 3A fit provides reliable engagement in high-vibration environments, preventing joint failure and minimizing maintenance downtime. Its fully threaded design ensures uniform stress distribution, enhancing load-bearing capacity in structural assemblies. The black-oxide coating adds a protective layer against rust and abrasion, making it suitable for outdoor or corrosive settings. With a Rockwell C37 hardness and 170,000 psi tensile strength, it delivers consistent performance in applications requiring precision and durability, such as equipment frames, hydraulic systems, and automated machinery.

Specification Summary & Compliance

This socket head cap screw features precise UNC 3/8"-16 coarse threads with Class 3A tolerance for accurate fit and optimal performance. Manufactured in compliance with ASTM A574 specifications, it ensures material consistency and mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial components.