S-91263A796 1/2"-20 x 1 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (130,000 PSI) ensures reliable performance in high-stress industrial applications
• Superior corrosion resistance through zinc-plated alloy steel construction for extended service life
• Precision Class 3A thread fit provides secure fastening with minimal vibration loosening
• 82° countersink angle allows for flush mounting in standard countersunk applications
• Hex drive design (5/16") enables high-torque installation with standard tools
• Fine UNF thread spacing delivers superior holding power in demanding environments
• Full threading along the entire 1-1/2" length maximizes engagement and load distribution

Professional Applications & Engineering Value

These 1/2"-20 UNF flat head screws with zinc-plated alloy steel construction address critical engineering challenges in industrial settings. The combination of 130,000 PSI tensile strength and Rockwell C39 hardness ensures reliable performance in high-vibration environments where fastener failure is not an option. The Class 3A thread fit provides precise engagement that resists loosening under dynamic loads, while the 82° countersink angle creates seamless flush mounting in machinery, automotive assemblies, and structural applications. The hex drive configuration allows for high-torque installation, making these industrial screws ideal for applications requiring both aesthetic cleanliness and mechanical reliability.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNF fine thread specifications. These flat head screws comply with ASTM F835 manufacturing standards and meet critical regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental standards. The 1-1/2" length with fully threaded design ensures consistent performance across industrial applications requiring reliable, high-strength fastening solutions.