S-98070A145 4-40 x 1" Sealing Stainless Steel Phillips Flat Head Screws
Sealing Stainless Steel Phillips Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior sealing performance with Buna-N rubber O-rings that maintain integrity across a wide temperature range from -40° to 225°F
- Exceptional pressure resistance capable of withstanding up to 1500 psi, ensuring reliable performance in demanding applications
- Corrosion-resistant construction using 18-8 stainless steel with passivated finish for enhanced durability in harsh environments
- Precise thread engagement with Class 2A UNC coarse threads providing secure fastening and vibration resistance
- Optimized head design featuring undercut flat profile for flush mounting and improved sealing surface contact
- Easy installation with Phillips No. 1 drive that offers familiar, efficient torque application
- Regulatory compliance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing
Professional Applications & Engineering Value
These 4-40 UNC flat head Phillips screws with integrated Buna-N rubber O-rings solve critical sealing challenges in industrial applications where fluid containment and pressure management are paramount. The 18-8 stainless steel construction with passivated finish provides excellent corrosion resistance, making them ideal for harsh environments including chemical processing, marine equipment, and outdoor machinery. The undercut flat head design ensures flush mounting while maximizing sealing surface contact, preventing leaks in panels, enclosures, and fluid systems. With fully threaded coarse UNC threads and Class 2A fit, these screws deliver reliable fastening performance even in high-vibration applications, eliminating the need for additional sealing components and reducing assembly time.
Specification Summary & Compliance
This 1" length screw features precise 4-40 UNC coarse threads with Class 2A thread fit for standard industrial applications. The manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility. The 100° countersink angle and 0.224" head diameter provide optimal flush mounting capability, while the maximum hole diameter of 0.129" ensures proper installation guidance for engineering applications requiring reliable sealing performance.
