S-92220A121 4-40 x 1/4" 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, long-lasting fastening in high-stress industrial environments.
- Superior corrosion resistance from the black-oxide finish prolongs service life and reduces maintenance in harsh conditions.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections with minimal risk of loosening.
- Low-profile socket head design allows for installation in tight spaces while providing ample torque with a hex drive.
- High hardness (Rockwell C39) enhances wear resistance and prevents stripping during repeated use.
- Coarse UNC threading enables quick assembly and disassembly, improving efficiency in production lines.
- Full compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chains.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these low profile socket head cap screws provide a robust fastening solution where space and reliability are critical. The black-oxide alloy steel construction offers excellent resistance to corrosion and wear, making them ideal for machinery, automotive assemblies, and electronic enclosures exposed to varying environmental conditions. With a Class 3A thread fit and coarse UNC threading, these screws deliver superior clamping force and vibration resistance, reducing the need for frequent retightening. Their hex drive design ensures easy installation with standard tools, streamlining assembly processes while maintaining high tensile strength and durability in high-performance settings.
Specification Summary & Compliance
This 4-40 UNC thread screw features a Class 3A thread fit for precise dimensional accuracy and is fully threaded for consistent engagement. Manufactured in compliance with ASTM A574 specifications, it meets stringent quality standards for alloy steel socket head cap screws. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.
