S-98070A134 2-56 x 3/16" Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Reliable Sealing Performance: Integrated Buna-N rubber O-ring provides excellent sealing against dust, moisture, and fluids, maintaining integrity under pressures up to 1500 psi.
• Superior Corrosion Resistance: Made from 18-8 Stainless Steel with a passivated finish, ensuring long-lasting durability in harsh environments and reducing maintenance needs.
• Wide Temperature Tolerance: O-ring functions effectively from -40° to 225°F, making it suitable for applications exposed to extreme thermal variations.
• Secure Fastening with Undercut Design: Flat head with undercut profile allows for flush mounting and improved seating, minimizing protrusion and enhancing assembly aesthetics.
• Easy Installation and High Tensile Strength: Phillips No. 1 drive enables straightforward installation, while 70,000 psi tensile strength ensures robust, vibration-resistant connections.
• Precision Thread Fit: UNC coarse threads with Class 2A fit offer consistent engagement and reliable performance in various materials, reducing the risk of cross-threading.
• Compliance with Environmental Standards: Meets RoHS 3 and REACH regulations, ensuring safe use in industrial applications without hazardous substances.

Professional Applications & Engineering Value

This 2-56 UNC Flat Head Phillips screw is engineered to address critical sealing challenges in industrial settings. The combination of 18-8 Stainless Steel and a passivated finish provides exceptional resistance to corrosion, making it ideal for outdoor, marine, or chemical-exposed applications. The integrated Buna-N rubber O-ring ensures a tight seal against liquids and gases, supporting operations in pneumatic systems, fluid handling equipment, and electronic enclosures where pressure integrity is vital. Its undercut flat head design allows for a smooth, flush finish, reducing snagging risks and improving aerodynamic or aesthetic profiles in assemblies. With a maximum pressure rating of 1500 psi and a broad temperature range, this screw delivers reliable performance in demanding environments such as automotive, aerospace, and machinery, ensuring long-term reliability and reduced downtime.

Specification Summary & Compliance

The screw features a 2-56 UNC coarse thread with Class 2A fit for precise dimensional accuracy and ease of assembly. It is fully threaded for maximum grip and adheres to standard inch measurements, including a length of 3/16 inch. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and suitability for global industrial markets, supporting responsible manufacturing practices.