S-90825A842 4-40 x 3/16" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Reliable sealing performance with a silicone rubber O-ring that maintains integrity across extreme temperatures from -80° to 400°F, preventing leaks in harsh environments.
• Superior corrosion resistance thanks to the 18-8 stainless steel material and passivated finish, ensuring long-term durability in moist or chemically aggressive settings.
• High tensile strength of 70,000 psi provides dependable load-bearing capacity, reducing the risk of fastener failure under stress.
• Effective pressure handling up to 6000 psi for use in high-pressure industrial systems where secure sealing is critical.
• Easy installation and removal with the Phillips drive (No. 1) and rounded pan head design, facilitating quick assembly without specialized tools.
• Precise thread fit (Class 2A) and coarse UNC threading for secure engagement and vibration resistance in various applications.
• Full threading ensures consistent grip along the entire length, enhancing sealing and fastening reliability.

Professional Applications & Engineering Value

This 4-40 UNC rounded head Phillips screw is engineered to address critical sealing challenges in industrial and mechanical systems. Constructed from 18-8 stainless steel with a passivated finish, it resists oxidation and chemical degradation, making it ideal for applications in automotive, aerospace, and fluid handling equipment. The integrated silicone rubber O-ring creates a robust seal that withstands temperature fluctuations from -80° to 400°F and pressures up to 6000 psi, preventing fluid or gas leaks in pumps, valves, and enclosures. Its coarse thread and Class 2A fit ensure easy installation and reliable performance in high-vibration environments, reducing maintenance needs and downtime. This screw is a cost-effective solution for engineers seeking durable, compliant fasteners that meet rigorous industry standards.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, and it is fully threaded for consistent performance. The manufacturing adheres to industry standards, and the product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.