S-95198A276 4-40 x 1/2" 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 integrated Buna-N rubber O-ring for reliable leak prevention in demanding environments
- Exceptional corrosion resistance from 18-8 stainless steel construction, ensuring long-term durability in harsh conditions
- Precision thread engagement with Class 3A fit for secure fastening and vibration resistance in critical assemblies
- High-pressure capability withstands up to 1500 psi maximum pressure for robust sealing applications
- Wide temperature tolerance with O-ring performance maintained from -40° to 225° F for versatile industrial use
- Maximum tensile strength of 100,000 psi provides reliable structural integrity under heavy loads
- Standard hex drive compatibility allows for easy installation and removal with common tools
Professional Applications & Engineering Value
This 4-40 UNC thread socket head cap screw delivers critical sealing solutions for industrial equipment requiring reliable pressure containment. The 18-8 stainless steel construction combined with Class 3A thread fit ensures precise engagement that maintains seal integrity even under vibration and thermal cycling. The integrated Buna-N rubber O-ring provides effective sealing across a broad temperature range from -40° to 225° F, making it ideal for hydraulic systems, pneumatic components, and fluid handling equipment where maximum pressure rating of 1500 psi must be maintained. The fully threaded design and coarse UNC thread pattern facilitate quick assembly while the hex drive socket head enables installation in confined spaces common in machinery and instrumentation applications.
Specification Summary & Compliance
This socket head cap screw features precise Class 3A thread fit with 4-40 UNC coarse thread specification and 1/2" length. Manufactured to meet ASME B18.3, DIN 912, and ISO 4762 standards for dimensional accuracy and performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
