S-90044A180 3/4"-10 x 3 1/2" 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 industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish prolongs service life in harsh environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit provides tight, secure connections with reduced risk of loosening under vibration or dynamic loads.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated assembly and disassembly.
• Coarse UNRC threads enable faster installation and better performance in materials where fine threads might strip or fail.
• 5/8" hex drive design allows for high torque application with standard tools, ensuring efficient installation and removal.
• Full 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 address critical challenges in heavy machinery, automotive, and construction sectors where high tensile strength and corrosion resistance are paramount. The Class 3A thread fit and coarse UNRC threads ensure secure fastening in soft or brittle materials, preventing stripping and maintaining clamp load under vibration. With a Rockwell C37 hardness, it withstands abrasive conditions and repeated use, reducing downtime in assembly lines. The 5/8" hex drive accommodates high-torque tools for efficient installation in confined spaces, making it ideal for structural frames, engine components, and industrial equipment requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

This socket head cap screw features a 3/4"-10 coarse thread with Class 3A precision fit per UNRC standards, ensuring dimensional accuracy and interchangeability. Manufactured in compliance with ASTM A574 for material consistency and performance, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, supporting safe and sustainable industrial use. The fully threaded design and right-hand thread orientation provide uniform stress distribution and ease of installation across various applications.