S-90201A678 3/4"-10 x 10" Extreme-Strength Grade 9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 180,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial environments
• Optimized installation efficiency through external hex drive design and 1 1/8" head width for secure tool engagement
• Enhanced thread reliability with Class 2A thread fit ensuring consistent assembly and reduced cross-threading risks
• Robust material performance featuring Grade 9 steel with Rockwell C38 hardness for maximum durability
• Versatile partial threading allowing for both clamping force and adjustment flexibility in various assembly configurations
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Grade 9 hex head screws deliver critical performance where failure is not an option. The 3/4"-10 UNC coarse thread configuration provides superior holding power in structural steel connections, heavy machinery assembly, and construction applications. The zinc yellow-chromate plating offers enhanced corrosion protection, significantly extending service life in environments exposed to moisture and chemicals. With partial threading and 10-inch length, these fasteners accommodate both thick material sections and precise clamping requirements. The 180,000 psi tensile strength and Rockwell C38 hardness ensure these heavy-duty hex screws maintain integrity under extreme vibration and dynamic loading conditions common in manufacturing, infrastructure, and heavy equipment applications.

Specification Summary & Compliance

This inch system fastener features precise Class 2A thread fit per UNC standards with 3/4"-10 coarse thread spacing and right-hand thread direction. Manufacturing complies with Grade 9 strength classification requirements, ensuring consistent mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, confirming environmental responsibility and material safety for industrial use. Dimensional specifications include 10" length with minimum 2" thread length, 1 1/8" head width, and 9/16" head height for standardized installation across compatible applications.