S-91253A848 3/4"-10 x 3 1/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 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 demanding environments.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance and durability, extending the screw's service life in harsh conditions.
• 82° countersink angle and flat head design allow for a flush, low-profile installation, minimizing protrusion and improving safety in machinery.
• Fully threaded UNC coarse spacing enables faster installation and stronger holding power, ideal for heavy-duty equipment assembly.
• 1/2" hex drive facilitates easy and secure tool engagement, reducing slippage and speeding up maintenance or installation processes.
• Rockwell C37 hardness ensures high wear resistance and longevity, maintaining integrity under repetitive loads and mechanical stress.

Professional Applications & Engineering Value

This 3/4"-10 UNC flat head socket cap screw is engineered to address critical challenges in industrial settings, such as vibration loosening and corrosion-induced failures. The black-oxide alloy steel construction, combined with a Class 3A thread fit, delivers superior clamping force and resistance to environmental degradation, making it ideal for heavy machinery, automotive assemblies, and structural frameworks. The fully threaded coarse spacing and 82° countersink angle ensure quick, flush mounting in pre-drilled holes, reducing assembly time and enhancing safety by eliminating protruding components. By meeting stringent standards like ASTM F835, it provides reliability in applications demanding high tensile strength and durability, ultimately minimizing downtime and maintenance costs for B2B clients.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 3A thread fit for tight tolerances and UNC coarse thread spacing in the inch system. It complies with ASTM F835 specifications for mechanical properties and is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence in industrial use.