S-90357A018 1/4"-20 x 1 1/2" 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 tensile strength (140,000 psi) for reliable performance in high-stress applications
- Precision Class 3A thread fit ensures secure fastening with minimal vibration loosening
- Black-oxide coating provides corrosion resistance and enhanced durability in industrial environments
- Ultra-low socket head profile enables installation in confined spaces without compromising drive engagement
- Alloy steel construction with Rockwell C32 hardness delivers superior wear resistance and long service life
- Coarse UNC threads allow for quick assembly and disassembly while maintaining holding power
- Tight length tolerance (±0.005") ensures consistent performance and precise fit in critical applications
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws are engineered to solve critical fastening challenges in demanding industrial environments. The combination of 140,000 psi tensile strength and Rockwell C32 hardness provides exceptional resistance to shear forces and wear, making them ideal for heavy machinery, automotive assemblies, and precision equipment. The ultra-low profile socket head design allows installation in space-constrained applications where standard fasteners cannot fit, while the 1/8" hex drive ensures maximum torque transmission without stripping. The Class 3A UNC coarse threads deliver superior engagement in both metallic and composite materials, reducing the risk of cross-threading during assembly. These fully threaded fasteners maintain consistent clamping force across the entire 1-1/2" length, providing reliable performance in vibration-prone applications.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with ±0.005" length tolerance and Class 3A thread fit per UNC standards. The fasteners feature right-hand coarse threads with 1/4"-20 specification and fully threaded design. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring restricted substance compliance.
