S-98070A136 4-40 x 3/16" Sealing Stainless Steel Phillips Flat Head Screws
Sealing Stainless Steel Phillips Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Reliable Sealing Performance: Buna-N rubber O-ring provides effective sealing up to 1500 psi, preventing leaks in pressurized applications.
- Corrosion Resistance: 18-8 stainless steel construction with passivated finish ensures long-term durability in harsh environments.
- Wide Temperature Tolerance: O-ring functions reliably from -40° to 225°F, suitable for diverse industrial conditions.
- Secure Fastening: Class 2A thread fit and UNC coarse threading enable quick installation and vibration resistance.
- Flush Mounting: Undercut flat head with 100° countersink angle sits flush for smooth surfaces and reduced snagging.
- Easy Installation: Phillips No. 1 drive allows for straightforward assembly with standard tools.
- Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
These 4-40 UNC flat head Phillips screws are engineered to address critical sealing challenges in industrial assemblies. The combination of 18-8 stainless steel and passivated finish provides excellent corrosion resistance, while the Buna-N rubber O-ring maintains integrity under pressures up to 1500 psi. Ideal for applications in machinery, fluid systems, and electronic enclosures, the fully threaded design and Class 2A thread fit ensure consistent clamping force and leak-proof performance. The undercut flat head with 100° countersink allows for seamless integration, reducing protrusion risks in tight spaces. This makes them valuable for maintaining reliability in high-pressure and temperature-variable environments, enhancing overall assembly longevity.
Specification Summary & Compliance
This screw features 4-40 UNC coarse threads with Class 2A fit for precise dimensional accuracy, ensuring compatibility with standard components. It is fully threaded and includes a Buna-N O-ring rated for -40° to 225°F. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its adherence to environmental and safety standards without hazardous substances.
