S-90825A570 2-56 x 1/4" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with silicone rubber O-rings rated for up to 6000 psi maximum pressure, preventing leaks in demanding industrial applications
• Exceptional corrosion resistance thanks to 18-8 stainless steel construction with passivated finish, ensuring long-term reliability in harsh environments
• Wide temperature compatibility with O-rings rated from -80° to 400° F, maintaining seal integrity across extreme thermal conditions
• High tensile strength of 70,000 psi provides reliable fastening performance under substantial mechanical stress
• Easy installation and removal with Phillips No. 1 drive and rounded pan head design for efficient assembly operations
• Precision threading with Class 2A UNC coarse threads ensuring consistent fit and reliable engagement in mating components
• Full regulatory compliance with RoHS 3 and REACH standards, meeting international environmental and safety requirements

Professional Applications & Engineering Value

This 2-56 UNC rounded head Phillips screw with integrated silicone rubber O-ring addresses critical sealing challenges in high-pressure industrial applications. The combination of 18-8 stainless steel material and passivated finish provides exceptional corrosion resistance for demanding environments including chemical processing, fluid handling systems, and outdoor equipment. The fully threaded design with Class 2A UNC coarse threads ensures reliable engagement while the rounded pan head profile distributes clamping force evenly. Engineered to maintain seal integrity at pressures up to 6000 psi and temperatures ranging from -80° to 400° F, these sealing screws prevent fluid and gas leakage in hydraulic systems, pneumatic controls, and precision instrumentation where environmental sealing is paramount for operational safety and equipment longevity.

Specification Summary & Compliance

This 1/4" length fastener features 2-56 UNC coarse threads with Class 2A thread fit tolerance for precise dimensional accuracy. The screw is fully threaded with right-hand thread direction and manufactured from 18-8 stainless steel with passivated finish for enhanced corrosion protection. The integrated silicone rubber O-ring provides reliable sealing performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international standards for hazardous substance restrictions and chemical safety.