S-90128A159 1/2"-13 x 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 guarantees tight, secure fastening with minimal backlash for vibration-resistant assemblies.
• High hardness rating (Rockwell C37) enhances wear resistance and maintains thread integrity during repeated installations.
• Convenient 3/8" hex drive allows for easy installation and removal with standard tools, improving assembly efficiency.
• Fully threaded design ensures consistent clamping force along the entire length for uniform load distribution.
• Compliance with ASTM A574 and environmental regulations (RoHS 3 & REACH) provides quality assurance and meets international standards.

Professional Applications & Engineering Value

These 1/2"-13 UNC socket head cap screws are engineered to address critical challenges in heavy-duty industrial applications where vibration resistance, corrosion protection, and high clamping forces are essential. The zinc-plated alloy steel construction provides excellent durability against environmental factors, while the coarse thread design ensures quick assembly and reliable performance in materials prone to stripping. The combination of 170,000 PSI tensile strength and Rockwell C37 hardness makes these fasteners ideal for machinery, automotive assemblies, and construction equipment where socket head access is required for tight spaces. Their fully threaded configuration delivers consistent engagement, preventing loosening under dynamic loads and reducing maintenance downtime.

Specification Summary & Compliance

This socket head cap screw features 1/2"-13 UNC coarse threads with Class 3A thread fit for precision alignment and secure fastening. Manufacturing complies with ASTM A574 specifications, ensuring consistent quality and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety standards for industrial use worldwide.