S-95198A449 4-40 x 3/4" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with Viton® fluoroelastomer O-ring that maintains integrity across extreme temperature ranges from -20° to 400°F
• Exceptional corrosion resistance through 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments
• High-pressure containment capability rated up to 1500 psi, providing secure sealing in demanding fluid and gas applications
• Precise Class 3A thread fit delivering superior engagement and vibration resistance for critical assembly requirements
• Optimized drive efficiency with 3/32" hex socket design enabling high torque application and reduced tool slippage
• Robust mechanical strength featuring 100,000 psi tensile strength and Rockwell B85 hardness for heavy-duty applications
• Comprehensive regulatory compliance meeting international standards including ASME B18.3, DIN 912, and ISO 4762

Professional Applications & Engineering Value

This 4-40 UNC thread socket head cap screw with Viton® O-ring addresses critical sealing challenges in industrial applications where pressure integrity and temperature stability are paramount. The 18-8 stainless steel construction provides excellent corrosion resistance for harsh environments, while the Class 3A thread fit ensures precise engagement in critical assemblies. Engineered for high-pressure applications up to 1500 psi, this sealing screw is ideal for hydraulic systems, pneumatic equipment, and fluid handling systems where leak prevention is essential. The right-hand coarse thread design facilitates quick installation, and the standard socket head profile with 3/32" hex drive allows for efficient torque application in confined spaces, making it particularly valuable for maintenance and OEM applications across multiple industries.

Specification Summary & Compliance

This socket head cap screw features precise 4-40 UNC coarse threads with Class 3A fit for superior thread engagement and meets ASME B18.3, DIN 912, and ISO 4762 manufacturing specifications. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental regulatory adherence for global industrial applications.