S-91864A041 1/4"-28 x 7/16" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel 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 in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish extends service life in harsh environments, minimizing maintenance and replacement costs.
- Precision Class 3A thread fit provides tight tolerances and secure fastening, ideal for applications requiring vibration resistance and minimal backlash.
- Fine UNF threading offers improved load distribution and better sealing capabilities compared to coarse threads, enhancing joint integrity.
- Hex socket drive design allows for high torque application and easy installation in confined spaces, improving assembly efficiency.
- Full threading along the entire length enables versatile positioning and adjustment, accommodating various material thicknesses.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and global regulatory acceptance for your projects.
Professional Applications & Engineering Value
Engineered for demanding environments, this black-oxide alloy steel socket head cap screw addresses critical industrial challenges such as vibration loosening and corrosion-induced degradation. The fine UNF thread with Class 3A fit ensures precise engagement in machinery, automotive assemblies, and precision equipment, where minimal thread play is essential. The high tensile strength and Rockwell C37 hardness provide durability under dynamic loads, making it suitable for aerospace, manufacturing, and heavy-duty applications. Its fully threaded design offers flexibility in adjusting clamp load, while the hex drive facilitates secure installation in tight spaces, reducing assembly time and improving operational reliability.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-28 UNF fine thread with Class 3A thread fit for high precision and consistent performance. It meets ASTM A574 specifications for alloy steel socket head cap screws, ensuring material quality and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for use in various industrial sectors.
