S-91253A945 1/2"-13 x 14" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 130,000 psi tensile strength for demanding industrial applications
• Exceptional wear resistance due to Rockwell C39 hardness alloy steel construction
• Precise thread engagement with Class 3A fit ensuring reliable fastening in critical assemblies
• Optimized countersinking with 82° flat head profile for flush mounting in various materials
• Enhanced torque transmission through 5/16" hex drive preventing tool slippage
• Reduced installation time with coarse UNC threads enabling quicker assembly
• Compliance assurance meeting ASTM F835 specifications for consistent quality performance

Professional Applications & Engineering Value

These 1/2"-13 UNC flat head screws deliver critical engineering solutions where high tensile strength and durable alloy steel construction are paramount. The partially threaded design concentrates strength where needed most, while the 82° countersink angle ensures secure, flush mounting in structural steel, heavy machinery, and industrial equipment. The coarse thread profile provides superior holding power in softer materials and faster installation in production environments. With Class 3A thread fit precision, these screws maintain consistent clamping force in vibration-prone applications, making them ideal for construction, manufacturing, and infrastructure projects requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

Manufactured to exacting inch system dimensions with Class 3A thread fit tolerance for precision assembly. Complies with ASTM F835 manufacturing standards for consistent quality and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features UNC coarse threads with right-hand direction and partial threading configuration. The 5/16" hex drive ensures compatibility with standard industrial tools.