S-91253A073 2-56 x 1/8" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional durability with 130,000 psi tensile strength and Rockwell C39 hardness for reliable performance in demanding environments
• Corrosion-resistant black-oxide finish on alloy steel extends service life and maintains integrity in industrial settings
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening and reduces the risk of loosening
• Fully threaded coarse UNC spacing provides faster installation and stronger holding power in various materials
• 82° countersink angle with a standard flat head profile allows for a flush, clean finish in assembled components
• Hex drive (0.050") design offers easy installation and removal with standard tools, minimizing slippage and damage
• Compliance with ASTM F835, RoHS 3, and REACH guarantees adherence to industry standards for safety and environmental regulations

Professional Applications & Engineering Value

This 2-56 UNC flat head screw is engineered to address common industrial challenges such as vibration-induced loosening and material fatigue. Constructed from black-oxide alloy steel, it provides superior resistance to wear and environmental factors, making it ideal for applications in machinery, electronics, and automotive assemblies. The fully threaded coarse spacing and Class 3A thread fit ensure tight, reliable connections that withstand dynamic loads. Its 82° countersink angle and hex drive facilitate efficient installation in tight spaces, reducing assembly time and improving overall structural integrity. These features make it a dependable choice for engineers seeking high-strength, compliant fasteners for critical operations.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit for precise dimensional accuracy and UNC coarse thread standards. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial use.