S-90128A725 1/2"-13 x 3 1/4" 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.
• Zinc-plated alloy steel construction provides superior corrosion resistance, extending service life in demanding industrial environments.
• Class 3A thread fit offers precise, secure engagement with mating parts, minimizing loosening under vibration.
• 3/8" hex drive design allows for high-torque installation with standard tools, speeding up assembly processes.
• Partially threaded shank enables accurate clamping without thread interference, ideal for precision fixturing.
• Rockwell C37 hardness maintains thread integrity and head durability, resisting wear during repeated use.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chains.

Professional Applications & Engineering Value

Engineered for high-strength industrial applications, this 1/2"-13 UNC Socket Head Cap Screw addresses critical challenges in machinery assembly, automotive systems, and heavy equipment. The zinc-plated alloy steel material combats rust and chemical exposure, while the coarse thread design facilitates quick installation in tough materials. Its partially threaded configuration prevents cross-threading and ensures uniform clamping force, making it ideal for precision engineering where vibration resistance and load distribution are paramount. With a 3/8" hex drive, it supports efficient maintenance and reduces downtime in production environments.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit for tight tolerances and UNC coarse thread standards, with a minimum thread length of 1 3/4". It meets ASTM A574 specifications for high-strength bolts and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no hazardous substances are used in manufacturing.