S-91253A798 5/8"-11 x 1 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 130,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through black-oxide coating that protects against rust and extends service life
• Precise torque transmission via 3/8" hex drive design that prevents stripping and ensures secure fastening
• Optimized thread engagement with Class 3A thread fit providing tighter tolerances for vibration-resistant connections
• Enhanced durability from Rockwell C37 hardness alloy steel that maintains integrity under repeated stress
• Versatile installation with fully threaded UNC coarse spacing for quicker assembly in various materials
• Regulatory compliance assurance meeting ASME B18.3, ASTM F835, RoHS 3 and REACH standards for global acceptance

Professional Applications & Engineering Value

These black-oxide alloy steel flat head socket cap screws deliver critical performance advantages in heavy machinery, structural frameworks, and precision equipment assembly. The 82° countersink angle creates flush mounting surfaces that eliminate protrusions in confined spaces, while the fully threaded UNC coarse spacing ensures rapid installation without compromising holding power. Engineered with Class 3A thread fit, these screws maintain clamping force in high-vibration environments where loosening could cause equipment failure. The combination of 130,000 psi tensile strength and Rockwell C37 hardness provides exceptional resistance to shear forces and deformation, making them ideal for critical joints in construction, automotive, and industrial manufacturing applications where reliability is non-negotiable.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 and ASTM F835 specifications, these screws feature precision 5/8"-11 UNC threads with Class 3A fit for superior dimensional accuracy. The right-hand threaded design with coarse spacing ensures compatibility with standard industrial components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental responsibility and workplace safety standards are met for global distribution and use.