S-91263A544 10-32 x 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated alloy steel construction, extending service life in harsh industrial environments
• Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
• High tensile strength rating of 130,000 psi provides secure fastening under heavy mechanical loads
• Rockwell C39 hardness maintains structural integrity and prevents thread deformation during installation
• Fully threaded design offers maximum grip length and uniform stress distribution across the entire fastener
• Hex drive compatibility enables secure tool engagement and efficient installation in confined spaces
• 82° countersink angle ensures flush mounting for streamlined surfaces and improved aerodynamics

Professional Applications & Engineering Value

These 10-32 UNF flat head screws with fine thread spacing deliver critical performance advantages in precision machinery, automotive assemblies, and electronic enclosures. The zinc-plated alloy steel construction provides essential corrosion protection while maintaining the 130,000 psi tensile strength required for high-stress applications. The Class 3A thread fit eliminates play and prevents loosening under vibration, making these hex drive screws ideal for applications where reliability is paramount. The combination of Rockwell C39 hardness and fully threaded design ensures consistent clamping force distribution, solving common issues of joint failure in dynamic load environments.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances with UNF fine thread specifications. These 1/2" length screws comply with ASTM F835 manufacturing standards and feature 82° countersink angle for proper flush mounting. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global markets.