S-91253A251 10-24 x 1 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
• Superior tensile strength of 130,000 psi ensures reliable performance under high-stress applications
• Precision Class 3A thread fit provides secure fastening with minimal vibration loosening
• Optimized 82° countersink angle delivers flush mounting for clean, professional installations
• Hex drive design allows for high-torque application and easy installation in confined spaces
• Rockwell C39 hardness maintains thread integrity and prevents stripping during repeated use
• Comprehensive compliance with ASTM F835, RoHS 3, and REACH ensures regulatory acceptance

Professional Applications & Engineering Value

These 10-24 UNC flat head screws deliver critical engineering solutions where vibration resistance and corrosion protection are paramount. The black-oxide alloy steel construction provides superior durability in harsh environments, while the Class 3A thread fit ensures precise engagement that withstands dynamic loads. The 82° countersink angle creates seamless surface transitions in machinery, automotive assemblies, and structural frameworks. With partial threading and 1/8" hex drive, these screws offer optimal clamping force distribution and efficient installation in space-constrained industrial applications where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread tolerances with UNC coarse threading and right-hand orientation. These 1-1/2" flat head screws meet ASTM F835 specifications for mechanical properties and dimensional accuracy. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.