S-92579A108 5/16"-18 x 3/4" ASTM A193, ASTM A574 High-Temperature Alloy Steel Socket Head Screws—Grade B7

Key Features & Benefits at a Glance

• Exceptional high-temperature performance - maintains structural integrity up to 1100°F for demanding thermal applications
• Superior tensile strength - 125,000 psi rating ensures reliable fastening in high-stress environments
• Precision thread engagement - Class 2A UNC coarse threads provide optimal fit and vibration resistance
• Heavy-duty material construction - ASTM Grade B7 alloy steel delivers outstanding durability and fatigue resistance
• Optimized drive efficiency - 1/4" hex socket design enables high torque application with minimal cam-out risk
• Full thread coverage - completely threaded shank maximizes engagement and load distribution
• Regulatory compliance assurance - meets critical industry standards for safety and environmental requirements

Professional Applications & Engineering Value

This ASTM Grade B7 alloy steel socket head cap screw delivers critical performance in demanding industrial environments where temperature extremes and high mechanical loads are common. The 5/16"-18 UNC thread configuration with Class 2A fit provides superior vibration resistance and reliable seating in coarse thread applications, making it ideal for heavy machinery, pressure vessels, and structural assemblies. The hex socket drive allows for high-torque installation in confined spaces, while the fully threaded design ensures maximum engagement depth and load distribution. Engineered to withstand temperatures up to 1100°F, this fastener maintains its 125,000 psi tensile strength in high-temperature industrial processes, power generation equipment, and petrochemical applications where thermal cycling would compromise inferior fasteners.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread spacing for optimal performance. Complies with ASTM A193 specifications for high-temperature service and meets ASTM A574 manufacturing requirements. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The inch system measurement provides standardized compatibility with North American equipment and machinery specifications.