S-91253A846 3/4"-10 x 2 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
• Superior tensile strength (130,000 psi) ensures reliable performance in heavy-duty applications
• Precision Class 3A thread fit provides secure, vibration-resistant fastening
• Full threading design maximizes grip strength and load distribution
• 82° countersink angle enables flush mounting for clean, professional finishes
• Hex drive compatibility allows for high-torque installation with standard tools
• Hardened alloy steel construction (Rockwell C37) delivers excellent durability and wear resistance

Professional Applications & Engineering Value

These 3/4"-10 UNC flat head screws with black-oxide alloy steel construction address critical engineering challenges in industrial fastening. The combination of coarse threading and Class 3A thread fit ensures rapid installation while maintaining vibration resistance in high-stress applications. The 82° countersink angle provides seamless integration into machinery frames, structural components, and equipment assemblies where flush surfaces are essential. With full threading extending the entire shank length, these hex drive screws distribute clamping force evenly, preventing joint failure in heavy machinery, construction equipment, and industrial manufacturing applications where reliability is paramount.

Specification Summary & Compliance

Manufactured to ASTM F835 specifications with Class 3A thread fit precision and UNC coarse threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features Rockwell C37 hardness and 130,000 psi tensile strength for consistent performance in inch-system applications.