S-90357A014 1/4"-20 x 5/8" 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 tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
- Precision Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in critical assemblies.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial environments.
- Ultra-low socket head profile allows installation in confined spaces where standard head heights are prohibitive.
- Rockwell C32 hardness delivers excellent wear resistance and durability, maintaining thread integrity through repeated use.
- Coarse UNC threading enables quick assembly and reduced cross-threading risks, improving installation efficiency.
- Full threading along the 5/8" length provides consistent clamping force and flexibility in adjustment depth.
Professional Applications & Engineering Value
These socket head cap screws are engineered to address common industrial challenges where space constraints and mechanical reliability are critical. The black-oxide alloy steel construction combats corrosion while the ultra-low profile head fits into tight clearances of machinery, automation systems, and precision equipment. With 1/4-20 UNC coarse threads and Class 3A fit, they ensure secure fastening in high-vibration environments like automotive assemblies and industrial machinery, reducing maintenance needs. The combination of 140,000 psi tensile strength and Rockwell C32 hardness makes them ideal for applications requiring repeated disassembly without thread degradation, providing long-term operational stability.
Specification Summary & Compliance
This fastener meets Class 3A thread fit tolerances with a length tolerance of -0.005" to 0.005" for precise dimensional accuracy. Manufactured to UNC coarse thread standards with a right-hand thread direction and fully threaded design. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions adherence for global industrial use.
