S-90128A852 1/2"-20 x 2 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 applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by the zinc-plated alloy steel material, extending service life in harsh industrial environments.
• Precise Class 3A thread fit allows for tighter tolerances and secure fastening in critical assemblies, minimizing backlash.
• Fine UNF thread design offers improved vibration resistance and better load distribution compared to coarse threads.
• 3/8" hex drive socket head enables high torque application with standard tools, facilitating quick and secure installation.
• Partially threaded shank design provides optimal grip length control and prevents thread damage during assembly.
• Industry compliance assurance with ASTM A574, RoHS 3, and REACH standards guarantees material quality and environmental safety.

Professional Applications & Engineering Value

These socket head cap screws deliver critical engineering solutions where precision and durability are paramount. The zinc-plated alloy steel construction provides excellent corrosion protection for machinery exposed to moisture or chemicals, while the Rockwell C37 hardness ensures superior wear resistance. The fine UNF threads with Class 3A fit maintain dimensional stability in vibration-prone applications such as automotive assemblies, industrial equipment, and precision manufacturing fixtures. The partially threaded configuration allows for precise clamping force control, preventing joint loosening in dynamic load conditions. These industrial screws are engineered to withstand extreme mechanical stresses while maintaining their integrity through repeated maintenance cycles.

Specification Summary & Compliance

This socket head cap screw features precise 1/2"-20 UNF fine threads with Class 3A thread fit for superior dimensional accuracy. Manufacturing follows ASTM A574 specifications for alloy steel socket head cap screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.