S-90128A252 1/4"-20 x 1 3/4" 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 excellent corrosion resistance, extending service life in harsh industrial environments.
• Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant assemblies.
• Partially threaded design allows for precise clamping force control and easier alignment in varied mounting scenarios.
• Coarse UNC threads enable quick installation and reduced cross-threading risks, boosting assembly efficiency.
• Hex socket drive with 3/16" size ensures high torque transmission and minimal tool slippage for consistent fastening.
• Rockwell C37 hardness delivers enhanced wear resistance, maintaining thread integrity over repeated use.

Professional Applications & Engineering Value

These 1/4"-20 UNC socket head cap screws are engineered to address critical challenges in industrial assemblies where vibration, high loads, and environmental factors are concerns. The zinc-plated alloy steel material combats corrosion, while the coarse thread design simplifies installation in tough materials, reducing assembly time and errors. Ideal for machinery, automotive, and heavy equipment applications, the partially threaded configuration ensures optimal grip and stress distribution. With a hex drive system, these screws provide reliable torque handling, making them essential for high-strength fastening in demanding engineering projects.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise dimensional accuracy and UNC coarse thread standards. It meets ASTM A574 specifications for high-strength socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.