S-95198A358 5/16"-18 x 1 1/2" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional sealing performance with the integrated Buna-N rubber O-ring, effectively preventing leaks in applications up to 1500 psi and temperatures from -40° to 225°F.
• High-reliability fastening ensured by the Class 3A thread fit, providing a precise, secure connection with minimal risk of loosening.
• Robust mechanical strength offering a tensile strength of 100,000 psi and Rockwell B85 hardness for demanding, high-stress applications.
• Optimized for high-torque installation with a standard hex socket head and 1/4" drive, allowing for easy access and secure driving in confined spaces.
• Broad industry compatibility due to compliance with ASME B18.3, DIN 912, and ISO 4762 standards, ensuring consistent quality and interchangeability.
• Environmental and regulatory compliance as a RoHS 3 and REACH compliant component, safe for use in regulated industries.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to solve critical challenges in industrial assembly and fluid systems. The 18-8 Stainless Steel body provides excellent resistance to rust and corrosion, making it suitable for outdoor, marine, and chemical processing equipment. The integrated Buna-N rubber O-ring creates a reliable static seal, effectively containing fluids and gases in hydraulic, pneumatic, and pump systems operating under pressures up to 1500 psi. The Class 3A thread fit and UNC coarse thread design ensure rapid assembly and a vibration-resistant connection, reducing maintenance needs. Its fully threaded design and socket head profile allow for deep engagement and easy installation in tight spaces, delivering long-term durability and performance in demanding engineering applications.

Specification Summary & Compliance

This fastener features a 5/16"-18 UNC thread with a Class 3A fit for high precision. It is manufactured to meet ASME B18.3, DIN 912, and ISO 4762 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.