S-98070A129 2-56 x 1/4" 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 long-term reliability in harsh environments
• Wide temperature compatibility with O-rings rated from -40° to 225°F, maintaining seal integrity across diverse operating conditions
• Precise thread engagement with UNC coarse threads and Class 2A fit, providing reliable fastening and vibration resistance
• Flush mounting capability with undercut flat head design, allowing smooth surface finishes in assembled components
• Easy installation with Phillips No. 1 drive, enabling efficient assembly while maintaining torque control
• Environmental compliance meeting RoHS 3 and REACH standards, ensuring safe use in regulated industries

Professional Applications & Engineering Value

These 2-56 UNC Flat Head Phillips screws deliver critical sealing solutions for industrial equipment where fluid containment is paramount. The combination of 18-8 stainless steel construction and Buna-N rubber O-rings addresses common failure points in hydraulic systems, pneumatic controls, and outdoor enclosures exposed to moisture and chemicals. The undercut flat head profile ensures proper seating in countersunk holes while the coarse UNC threading provides excellent grip in various materials. Engineered for applications requiring both structural fastening and environmental sealing, these screws prevent costly downtime in manufacturing, automotive, and electrical assemblies where pressure integrity and corrosion resistance are non-negotiable requirements.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications (2-56 size, 0.086" diameter). Features include 100° countersink angle, fully threaded design, and maximum hole diameter compatibility of 0.095". Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures material safety and regulatory acceptance for industrial use worldwide.