S-90665A155 1/4"-20 x 3/8" ASTM A574 Alloy Steel Low-Profile Socket Head Screws
Alloy Steel 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 in high-stress industrial applications
- Premium zinc-plated alloy steel construction provides superior corrosion resistance and extended service life
- Class 3A thread fit delivers precise, secure fastening with minimal vibration loosening
- Low-profile socket head design allows installation in confined spaces while maintaining high torque capability
- Coarse UNC threading enables quick assembly and disassembly in demanding environments
- Rockwell C39 hardness rating guarantees excellent wear resistance and durability
- Full compliance with industry standards including ASTM A574, RoHS 3, and REACH regulations
Professional Applications & Engineering Value
These 1/4-20 UNC socket head cap screws deliver exceptional engineering value in demanding industrial environments. The zinc-plated alloy steel construction provides superior corrosion protection while maintaining the 140,000 psi tensile strength required for critical applications. The low-profile socket head design enables installation in tight spaces where standard fasteners cannot fit, while the hex drive ensures maximum torque transmission without stripping. These class 3A thread fasteners maintain precise tolerances in machinery, automotive assemblies, and heavy equipment where vibration resistance and reliable clamping force are essential. The coarse thread pitch facilitates rapid assembly in production environments while providing excellent holding power in various materials.
Specification Summary & Compliance
This socket head cap screw features precision 1/4"-20 UNC coarse threading with Class 3A fit for superior dimensional accuracy. Manufactured to ASTM A574 specifications with Rockwell C39 hardness and 140,000 psi tensile strength. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The 3/8" length and 1/8" hex drive provide standardized installation compatibility with industry-standard tools.
