S-91864A047 1/4"-28 x 9/16" 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 under high-stress conditions, reducing the risk of fastener failure.
- Precision Class 3A thread fit provides superior engagement and vibration resistance, maintaining secure connections in dynamic applications.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in demanding industrial environments.
- Fine UNF threads allow for finer adjustments and better clamping force control compared to coarse threads.
- Fully threaded design ensures consistent holding power along the entire length, ideal for applications requiring uniform load distribution.
- Hex socket drive enables high-torque installation with reduced risk of cam-out, facilitating efficient assembly in confined spaces.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting strict industry regulations.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in precision machinery, automotive assemblies, and heavy-duty equipment. The Class 3A UNF fine threads deliver excellent fatigue resistance and minimize loosening under vibration, while the 170,000 psi tensile strength and Rockwell C37 hardness ensure durability in high-load scenarios. The fully threaded rod type provides uniform stress distribution, preventing point failures. Ideal for applications requiring high-strength fasteners with reliable hex drive installation, it supports efficient maintenance and reduces downtime in industrial settings.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-28 UNF thread with Class 3A fit for precise tolerance, ensuring consistent performance. It meets ASTM A574 specifications for high-strength alloy steel and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industries.
