S-90825A628 4-40 x 7/8" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with silicone rubber O-ring that maintains integrity across extreme temperatures from -80° to 400° F
• Exceptional pressure resistance rated for applications up to 6000 psi, ensuring reliable performance in demanding environments
• Enhanced corrosion resistance through 18-8 stainless steel construction with passivated finish for extended service life
• Precise thread engagement with Class 2A UNC coarse threads providing secure fastening and vibration resistance
• Optimized drive efficiency with Phillips No. 1 drive style for consistent torque application and reduced cam-out
• Complete thread coverage with fully threaded design ensuring maximum holding power along the entire 7/8" length
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmental and safety requirements

Professional Applications & Engineering Value

This 4-40 UNC rounded head sealing screw delivers critical engineering solutions for industrial applications requiring both secure fastening and reliable sealing performance. The combination of 18-8 stainless steel construction and passivated finish provides exceptional corrosion resistance in harsh environments, while the integrated silicone rubber O-ring creates an effective seal against fluids and gases across extreme temperature ranges. The pan head design with Phillips drive offers practical installation advantages, and the Class 2A thread fit ensures precise engagement with mating components. These industrial fasteners are engineered to maintain integrity under pressures up to 6000 psi, making them ideal for hydraulic systems, pneumatic equipment, and other high-pressure applications where failure is not an option.

Specification Summary & Compliance

This sealing screw features 4-40 UNC coarse threads with Class 2A fit for precise dimensional accuracy and reliable engagement. The fully threaded design provides consistent fastening along the entire 7/8" length, while the standard pan head profile accommodates standard installation tools. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. Manufactured to exacting standards, these screws deliver consistent performance with maximum hole diameter compatibility of 0.127" for optimal application fit.