S-91251A636 3/8"-16 x 3" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI for reliable performance in demanding applications
• Superior corrosion resistance provided by the black-oxide finish on alloy steel
• Precision Class 3A thread fit ensures secure fastening and vibration resistance
• Hex socket drive design allows for high-torque installation in confined spaces
• Partially threaded configuration provides optimal grip and clamping force control
• Heavy-duty construction with Rockwell C37 hardness for long-term durability
• Industry compliance with ASTM A574, RoHS 3, and REACH environmental standards

Professional Applications & Engineering Value

These 3/8"-16 UNC socket head cap screws deliver exceptional engineering value across industrial applications where reliability is paramount. The black-oxide alloy steel construction provides superior corrosion protection while maintaining the 170,000 PSI tensile strength required for heavy machinery, automotive assemblies, and precision equipment. The Class 3A thread fit and coarse thread spacing ensure secure fastening in high-vibration environments, while the 5/16" hex drive accommodates standard tools for efficient installation. The partially threaded design offers controlled clamping force, making these industrial fasteners ideal for applications requiring precise joint integrity without compromising structural performance.

Specification Summary & Compliance

This socket head cap screw features precision 3/8"-16 UNC threads with Class 3A fit for superior thread engagement. Manufactured to ASTM A574 specifications with Rockwell C37 hardness and 170,000 PSI tensile strength. The inch system fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.