S-98070A132 2-56 x 3/8" Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with Buna-N rubber O-rings that withstand pressures up to 1500 psi, preventing leaks in demanding applications.
• Excellent corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh environments.
• Wide temperature compatibility with O-rings rated from -40° to 225°F, maintaining seal integrity across diverse operating conditions.
• Reliable thread engagement with Class 2A fit and UNC coarse threads, providing secure fastening and easy installation.
• Flush mounting capability due to the flat undercut head design, ideal for applications requiring a smooth surface finish.
• High tensile strength of 70,000 psi, offering robust mechanical performance for industrial and engineering uses.
• Environmental compliance with RoHS 3 and REACH standards, ensuring safe and sustainable material usage.

Professional Applications & Engineering Value

This 2-56 UNC Flat Head Phillips screw is engineered to address critical sealing challenges in industrial assemblies, such as fluid systems, pneumatic devices, and electronic enclosures. The combination of 18-8 stainless steel and a passivated finish provides exceptional resistance to corrosion and oxidation, extending service life in humid or chemically aggressive settings. The integrated Buna-N rubber O-ring ensures a tight seal against dust, moisture, and pressure fluctuations up to 1500 psi, reducing maintenance needs and downtime. Its undercut flat head allows for countersunk installation, minimizing protrusion and enhancing aerodynamic or aesthetic profiles. Fully threaded with a Class 2A fit, it guarantees precise alignment and vibration resistance, making it a reliable choice for automotive, aerospace, and machinery sectors where leak-proof fastening is paramount.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy and ease of assembly. It is manufactured from 18-8 stainless steel and features a passivated finish to enhance durability. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to environmental and safety regulations for industrial use.