S-95198A450 4-40 x 7/8" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws
Sealing Socket 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
- Superior Sealing Performance with Viton® fluoroelastomer O-ring for reliable leak prevention in high-pressure and temperature-variable environments.
- Exceptional Corrosion Resistance due to 18-8 stainless steel construction, ensuring long-term durability in harsh industrial conditions.
- High Tensile Strength of 100,000 psi provides reliable fastening under extreme mechanical stress, reducing failure risks.
- Precision Thread Fit with Class 3A UNC coarse threads ensures easy installation and secure, vibration-resistant connections.
- Wide Temperature Tolerance from -20° to 400° F, maintaining seal integrity in both cryogenic and high-heat applications.
- Standard Hex Drive Compatibility with 3/32" drive size allows for quick assembly using common tools, improving installation efficiency.
- Regulatory Compliance with RoHS 3 and REACH, ensuring environmental safety and global market acceptance.
Professional Applications & Engineering Value
This socket head cap screw is engineered to address critical sealing challenges in demanding sectors such as hydraulic systems, automotive assemblies, and chemical processing equipment. The 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, while the Viton® O-ring provides a dependable seal against fluids and gases up to 1500 psi. Its UNC coarse thread design and Class 3A thread fit facilitate rapid installation and maintain tightness under vibration, reducing maintenance downtime. Ideal for applications requiring high-pressure sealing and thermal stability, this screw ensures operational reliability in industrial machinery, fluid control systems, and precision engineering projects.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 3A precision fit, ensuring dimensional accuracy and interchangeability. It complies with ASME B18.3, DIN 912, and ISO 4762 standards for consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for industrial use.
