S-95198A404 1/2"-13 x 1 3/8" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with Buna-N rubber O-ring, preventing leaks in high-pressure applications up to 1500 PSI.
• Excellent corrosion resistance from 18-8 stainless steel construction, ideal for harsh or humid industrial environments.
• High tensile strength of 100,000 PSI ensures reliable load-bearing capacity and reduces risk of fastener failure.
• Precise Class 3A thread fit for smooth assembly and secure fastening in demanding mechanical applications.
• Wide temperature tolerance from -40° to 225°F, maintaining seal integrity and performance in extreme conditions.
• Fully threaded design provides consistent engagement and clamping force along the entire screw length.
• Compliance with major standards including ASME B18.3, DIN 912, and ISO 4762, ensuring interchangeability and quality assurance.

Professional Applications & Engineering Value

This 18-8 stainless steel socket head cap screw is engineered to address critical sealing and durability challenges in industrial settings. The integrated Buna-N O-ring creates a reliable seal against fluids and gases, making it ideal for hydraulic systems, pumps, and compressed air equipment where pressure integrity is paramount. With a coarse UNC thread and Class 3A fit, it ensures quick installation and vibration resistance in machinery assembly. The hex drive design allows for high-torque application without stripping, while the fully threaded body distributes stress evenly, enhancing joint stability in heavy-duty applications such as automotive manufacturing, industrial machinery, and processing equipment.

Specification Summary & Compliance

This fastener features a 1/2"-13 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy. It complies with ASME B18.3, DIN 912, and ISO 4762 manufacturing standards, ensuring consistent quality and interchangeability. Environmental and safety compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting sustainable procurement practices.