S-90357A116 4-40 x 3/8" Alloy Steel Ultra-Low-Profile Socket Head Screws
Alloy Steel Ultra-Low-Profile 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 strength-to-weight ratio with 140,000 psi tensile strength for reliable performance in demanding applications
- Precision thread engagement with Class 3A fit ensures consistent clamping force and vibration resistance
- Enhanced corrosion protection through black-oxide coating on alloy steel for extended service life
- Space-saving ultra-low profile head design allows installation in confined spaces while maintaining full hex drive functionality
- Superior material hardness at Rockwell C32 prevents stripping and maintains thread integrity under stress
- Industry-standard UNC coarse threads provide quick assembly and disassembly in right-hand threaded applications
- Regulatory compliance assurance with RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for precision assemblies where space constraints and reliability are critical, these socket head cap screws deliver outstanding performance in machinery, aerospace components, and electronic enclosures. The black-oxide alloy steel construction combined with Class 3A thread fit ensures minimal backlash and superior vibration resistance in dynamic environments. The ultra-low profile head design enables flush mounting in compact assemblies while maintaining the full torque capability of the hex drive system. These 4-40 UNC coarse threads provide excellent engagement in both metallic and high-strength polymer materials, making them ideal for applications requiring repeated maintenance access without compromising thread integrity.
Specification Summary & Compliance
Manufactured to precise dimensional standards with length tolerance of -0.005" to 0.005" and Class 3A thread fit per UNC specifications. The fully threaded design ensures consistent engagement along the entire 3/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting international standards for industrial fastener applications.
