S-90696A258 7/8"-9 x 5 1/2" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Exceptional tensile strength rated at 70,000 psi ensures reliable performance under heavy loads and vibration
• Precision Class 3A thread fit provides superior engagement and consistent clamping force in critical applications
• High hardness rating (Rockwell B70) maintains thread integrity and prevents stripping during repeated installations
• Optimized hex drive design with 3/4" drive size delivers maximum torque transmission and prevents tool slippage
• Coarse UNC threading enables faster assembly and reduced cross-threading risk in industrial settings
• Comprehensive compliance with ASME B18.3, RoHS 3, and REACH ensures quality and environmental responsibility

Professional Applications & Engineering Value

This 18-8 stainless steel socket head cap screw delivers exceptional engineering value across demanding industrial applications. The 7/8"-9 UNC coarse thread configuration provides rapid assembly in heavy machinery, manufacturing equipment, and structural frameworks where vibration resistance is critical. The partially threaded design offers precise clamping control, while the 3/4" hex drive accommodates high-torque applications without cam-out. The Rockwell B70 hardness and 70,000 psi tensile strength ensure reliable performance in high-stress environments, from automotive assemblies to industrial processing equipment. The corrosion-resistant properties of 18-8 stainless steel make these socket head cap screws ideal for outdoor applications, marine environments, and chemical processing facilities where durability is paramount.

Specification Summary & Compliance

This socket head cap screw features precision Class 3A thread fit with 7/8"-9 UNC coarse threads and a minimum thread length of 2 1/4". Manufactured to exacting ASME B18.3 standards, the fastener maintains dimensional accuracy throughout its 5 1/2" length. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting the latest environmental regulations for industrial components. The 18-8 stainless steel composition ensures consistent mechanical properties and reliable performance across all specified applications.