S-91251A716 1/2"-13 x 1 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.
• Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies in machinery and equipment.
• Black-oxide finish on alloy steel offers enhanced corrosion resistance and durability, extending service life in harsh environments.
• Fully threaded coarse UNC design delivers faster installation and improved holding power, ideal for heavy-duty fastening needs.
• 3/8" hex drive socket head allows for easy access and high-torque application with standard tools, streamlining maintenance and assembly processes.
• Rockwell C37 hardness ensures high wear resistance and longevity, minimizing replacement costs and downtime.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global industrial use.

Professional Applications & Engineering Value

These socket head cap screws are engineered to address critical challenges in industrial settings, such as vibration loosening and material fatigue. Made from black-oxide alloy steel, they provide excellent strength and corrosion protection, making them suitable for demanding applications in machinery, automotive, and construction. The coarse UNC thread and fully threaded design ensure quick, secure fastening in materials where fine threads might strip, while the Class 3A thread fit enhances reliability in precision assemblies. Ideal for use in high-torque environments, these screws help reduce maintenance intervals and improve overall equipment durability, supporting efficient B2B procurement for robust fastening solutions.

Specification Summary & Compliance

This product meets precise dimensional standards, including Class 3A thread fit and UNC coarse thread spacing, ensuring consistent performance and interchangeability. It conforms to ASTM A574 specifications for high-strength alloy steel socket head cap screws, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for environmentally conscious industrial applications without hazardous substances.