S-91306A343 10-24 x 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• Superior tensile strength of 120,000 psi ensures reliable performance under high-stress conditions without failure
• Precise Class 3A thread fit provides secure, vibration-resistant fastening with minimal risk of loosening
• Rockwell C39 hardness rating delivers excellent durability and wear resistance for extended service life
• Hex drive design with 1/8" drive size allows for easy installation and high torque application with standard tools
• Fully threaded coarse spacing enables faster assembly and stronger holding power in various materials
• Comprehensive regulatory compliance meets ASME B18.3, ASTM F835, RoHS 3 and REACH standards for global acceptance

Professional Applications & Engineering Value

These 10-24 UNC zinc-plated alloy steel rounded head screws solve critical engineering challenges in heavy machinery, automotive assemblies, and industrial equipment where vibration resistance and corrosion protection are paramount. The button head profile with hex drive provides a low-profile, secure fastening solution that withstands extreme operational stresses while maintaining accessibility for maintenance. The Class 3A thread fit with coarse thread spacing ensures reliable engagement in both metallic and composite materials, preventing thread stripping and maintaining joint integrity. With 120,000 psi tensile strength and Rockwell C39 hardness, these industrial screws deliver exceptional performance in applications requiring repeated disassembly and reassembly without compromising fastener integrity.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit tolerances with UNC coarse thread spacing and right-hand threading. Complies with ASME B18.3 dimensional standards and ASTM F835 mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements for hazardous substances. Features fully threaded design with 1/2" length and 0.361" head diameter for consistent performance across industrial applications.