S-90152A110 4-40 x 1/4" ASME B18.3, ASTM F837 Stainless Steel Wire-Lockable Socket Head Screws
Stainless Steel Wire-Lockable Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
- High-strength performance with 80,000 psi tensile strength, ensuring secure and durable fastening under heavy loads.
- Precise thread engagement via Class 3A thread fit and UNC coarse thread, providing reliable assembly and vibration resistance.
- Optimized for high-torque applications featuring a standard socket head and 3/32" hex drive for easy installation and removal.
- Superior material hardness at Rockwell B70, offering excellent wear resistance and reduced risk of stripping or damage.
- Broad industry compliance meeting ASME B18.3 and ASTM F837 specifications, ensuring quality and interchangeability.
- Environmentally responsible manufacturing with RoHS 3 compliance, free from hazardous substances for safe use.
Professional Applications & Engineering Value
This 4-40 UNC Socket Head Cap Screw is engineered to address critical challenges in precision assembly and high-stress environments. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in marine, chemical processing, and outdoor equipment where moisture and chemicals are prevalent. The Class 3A thread fit and coarse UNC thread design ensure tight, reliable fastening that minimizes loosening from vibrations, which is vital in machinery, automotive, and aerospace components. With a socket head and hex drive, it allows for compact installation in confined spaces, enhancing design flexibility. Its high tensile strength and hardness support demanding industrial uses, reducing maintenance needs and downtime.
Specification Summary & Compliance
This screw features a 4-40 UNC thread with Class 3A precision fit for accurate engagement, and it is fully threaded for consistent holding power. Dimensions include a 1/4" length, 0.183" head diameter, and 3/32" hex drive size. It complies with ASME B18.3 and ASTM F837 standards for quality assurance, and meets RoHS 3 (2015/863/EU) environmental regulations, ensuring it is free from restricted substances.
