S-91253A080 2-56 x 7/16" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments.
• High tensile strength of 130,000 psi ensures reliable performance under heavy loads and stress.
• Precise Class 3A thread fit provides superior engagement and vibration resistance in assemblies.
• Hex drive design (0.050") allows for high-torque installation and easy, secure fastening.
• Fully threaded coarse (UNC) spacing offers quick assembly and strong holding power.
• 82° flat head profile enables a flush, low-profile finish for streamlined surfaces.
• Rockwell C39 hardness delivers excellent durability and wear resistance for long service life.

Professional Applications & Engineering Value

This 2-56 UNC flat head screw is engineered from black-oxide alloy steel to address common industrial challenges such as corrosion, high stress, and assembly efficiency. The fully threaded coarse spacing and Class 3A thread fit ensure secure, vibration-resistant connections in machinery, electronics, and automotive components. Its hex drive design facilitates quick installation with standard tools, reducing assembly time while maintaining 130,000 psi tensile strength. Ideal for applications requiring a flush surface, the flat head and robust material properties make it a reliable choice for demanding environments where durability and compliance with industry standards are critical.

Specification Summary & Compliance

This screw features a 2-56 UNC thread with Class 3A fit for precise dimensional accuracy, ensuring consistent performance. It is manufactured in accordance with ASTM F835 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity for industrial use.