S-95198A446 4-40 x 3/8" 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, effectively preventing leaks in high-pressure and temperature-variable environments.
• Exceptional corrosion resistance due to 18-8 Stainless Steel construction, ensuring long-term reliability in harsh industrial conditions.
• High tensile strength of 100,000 psi provides robust fastening integrity, reducing the risk of failure under heavy loads.
• Precise Class 3A thread fit offers smooth installation and secure engagement, minimizing assembly errors and improving efficiency.
• Wide temperature tolerance from -20° to 400° F, making it ideal for applications exposed to extreme thermal cycles.
• Maximum pressure resistance up to 1500 psi, ensuring dependable performance in demanding hydraulic and pneumatic systems.
• Compliance with major international standards like ASME B18.3, DIN 912, and ISO 4762, guaranteeing interoperability and quality assurance.

Professional Applications & Engineering Value

This 4-40 UNC Thread Socket Head Cap Screw is engineered to address critical sealing challenges in industrial settings. The Viton® Fluoroelastomer O-Ring provides a reliable seal that withstands aggressive chemicals, oils, and wide temperature fluctuations, preventing leaks in high-pressure applications such as hydraulic systems, pumps, and valves. Made from 18-8 Stainless Steel, it resists corrosion and maintains structural integrity in moist or corrosive environments, reducing maintenance needs. The hex drive design with a 3/32" drive size allows for easy installation in confined spaces, while the Class 3A thread fit ensures precise alignment and vibration resistance. Ideal for aerospace, automotive, and machinery assemblies, this screw delivers consistent performance where reliability is paramount.

Specification Summary & Compliance

This product features a 4-40 UNC coarse thread with Class 3A fit for high precision and strength. It adheres to ASME B18.3, DIN 912, and ISO 4762 standards, ensuring dimensional accuracy and compatibility. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory requirements in global markets.