S-90117A535 1/4"-20 x 3/8" ASME B18.3 Alloy Steel Wire-Lockable Socket Head Screws
Alloy 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 tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Precise Class 3A thread fit provides superior engagement and vibration resistance in demanding applications.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, low-reflectivity finish.
- Hex socket drive design allows for easy installation and removal in confined spaces with standard tools.
- Coarse UNC threading enables quick assembly and disassembly, improving efficiency in maintenance and production.
- Full compliance with ASME B18.3 standards guarantees consistent quality and interchangeability in industrial setups.
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
This 1/4"-20 UNC Socket Head Cap Screw is engineered to address critical challenges in machinery assembly, automotive, and heavy equipment sectors. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, delivers outstanding wear resistance and longevity, even in high-vibration environments. Its coarse thread and Class 3A fit minimize cross-threading risks and provide secure fastening in dynamic loads. Ideal for applications requiring compact head profiles, the hex drive ensures torque efficiency without slippage, reducing downtime and maintenance costs. By meeting ASME B18.3 specifications, it offers reliable performance in precision engineering and OEM components.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with Class 3A precision for tight tolerances and optimal thread engagement. It complies with ASME B18.3 manufacturing standards, ensuring dimensional accuracy and reliability. Additionally, it is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmentally responsible and safe industrial use.
