S-91306A294 3/8"-16 x 2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in demanding environments
• Exceptional load-bearing capability thanks to 120,000 psi tensile strength and Rockwell C39 hardness for reliable performance under stress
• Precise, secure fastening with Class 3A thread fit ensuring tight tolerances and vibration resistance in critical assemblies
• Efficient installation and removal using the 7/32" hex drive that prevents cam-out and allows high torque application
• Versatile coarse threading (UNC) that provides rapid assembly and superior holding power in various materials
• Full thread coverage along the 2" length for maximum grip and distribution of clamping force
• Regulatory compliance assurance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

This zinc-plated alloy steel rounded head screw delivers critical performance where vibration resistance, corrosion protection, and high tensile strength are paramount. The Class 3A UNC coarse thread ensures rapid installation while maintaining precise fit in machinery, structural frames, and heavy equipment assemblies. The button head profile with hex drive provides a low-profile finish that minimizes protrusion hazards while allowing substantial torque application. Engineered to withstand extreme mechanical stresses up to 120,000 psi, these fully threaded screws distribute clamping force evenly across the entire 2" length, preventing joint failure in industrial applications involving dynamic loads or thermal cycling. The combination of zinc plating and alloy steel construction offers superior corrosion resistance for outdoor equipment, manufacturing systems, and automotive components where environmental exposure is a concern.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit tolerances with UNC coarse thread spacing (3/8"-16). Complies with ASME B18.3 and ASTM F835 manufacturing specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features right-hand threading, fully threaded design, and standardized dimensions including 0.656" head diameter and 0.199" head height for consistent performance across industrial applications.