S-90128A732 1/2"-13 x 4 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 from zinc plating extends service life in harsh industrial environments, minimizing maintenance needs.
• Precise Class 3A thread fit provides secure, vibration-resistant connections for improved assembly integrity.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread form and drive integrity through repeated use.
• 3/8" hex drive design allows for high torque application with standard tools, enabling efficient installation and removal.
• Partially threaded shank concentrates clamping force where needed, enhancing joint stability in structural applications.
• Compliance with RoHS 3 and REACH ensures environmental and safety standards are met for global industrial use.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these zinc-plated alloy steel socket head cap screws address critical challenges in machinery, automotive, and heavy equipment assembly. The 1/2"-13 UNC coarse thread design facilitates quick installation and provides superior holding power in brittle materials or high-vibration environments. With a Rockwell C37 hardness and 170,000 psi tensile strength, they resist stripping and deformation under extreme loads. The 3/8" hex drive accommodates high torque values without slippage, while the zinc plating creates a protective barrier against corrosion, extending service life in outdoor or chemically exposed applications. These fasteners deliver reliable performance where failure is not an option.

Specification Summary & Compliance

This socket head cap screw features 1/2"-13 UNC coarse threads with Class 3A fit for precise engagement, manufactured to ASTM A574 specifications for consistent quality. The partially threaded design provides optimal clamping, with a 4 1/2" length and right-hand thread direction meeting inch system standards. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) for environmental safety in industrial applications.