S-91251A683 7/16"-14 x 3 1/2" 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.
- Superior corrosion resistance from the black-oxide finish extends service life in harsh environments.
- Precise Class 3A thread fit guarantees secure fastening and reduces the risk of assembly failures.
- Partially threaded design provides optimal grip and alignment for versatile mounting needs.
- High hardness (Rockwell C37) enhances durability and resistance to wear and deformation.
- 3/8" hex drive allows for easy installation and removal with standard tools, improving efficiency.
- Compliance with ASTM A574, RoHS 3, and REACH ensures environmental safety and meets rigorous industry standards.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in demanding industrial settings. Its 7/16"-14 UNC coarse thread and Class 3A fit deliver superior clamping force and vibration resistance, preventing loosening in machinery, automotive assemblies, and heavy equipment. The partially threaded rod type allows for precise engagement in tapped holes, reducing stress concentration. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands extreme loads and impacts, while the black-oxide coating provides essential corrosion resistance in humid or chemical-exposed environments. Ideal for applications requiring high-strength fasteners with reliable performance and compliance, this screw ensures long-term operational integrity and reduces maintenance costs.
Specification Summary & Compliance
This product features a 3 1/2" length with a minimum thread length of 1 3/8", UNC coarse threads, and precise Class 3A thread fit for accurate installation. It meets ASTM A574 specifications for high-strength socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
