S-91864A040 1/4"-28 x 5/16" 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 fine threads provide superior fit and vibration resistance, maintaining secure connections in demanding applications.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish for extended service life.
- Rockwell C37 hardness delivers excellent wear resistance, minimizing deformation and ensuring long-term dimensional stability.
- Fully threaded design allows for maximum grip and adjustability along the entire length, facilitating precise assembly.
- 3/16" hex drive socket head enables easy installation and removal with standard tools, even in confined spaces.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial use.
Professional Applications & Engineering Value
This 1/4"-28 UNF Socket Head Cap Screw is engineered to address critical challenges in industrial assembly, where high tensile strength and vibration resistance are paramount. The Black-Oxide Alloy Steel construction, combined with Class 3A fine threads, ensures a tight, secure fit that withstands dynamic loads and prevents loosening in machinery, automotive, and aerospace components. The fully threaded rod type allows for uniform stress distribution, reducing the risk of shear failure. Ideal for applications requiring precision fastening and durability, this screw meets rigorous standards, providing reliable performance in harsh environments while maintaining RoHS and REACH compliance for safe, sustainable operations.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-28 UNF fine thread with Class 3A fit for high precision and strength. It adheres to ASTM A574 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications without hazardous substances.
