S-91251A259 10-24 x 4 3/8" 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.
- Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies in demanding applications.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish for extended service life.
- Partially threaded design allows for precise clamping force control and secure fastening in specific joint configurations.
- Hex socket drive (5/32") enables high-torque installation with standard tools, minimizing stripping and improving assembly efficiency.
- Coarse UNC threads facilitate quick installation and are less prone to clogging in dirty or debris-filled environments.
- Rockwell C37 hardness ensures excellent wear resistance and durability, maintaining thread integrity through repeated use.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in industrial and mechanical assemblies. Its 10-24 UNC coarse thread and Class 3A fit provide superior holding power and vibration resistance, making it ideal for machinery, automotive, and heavy equipment where high tensile strength and reliability are paramount. The partially threaded shank allows for precise unthreaded engagement in clearance holes, reducing stress concentration. Combined with the hex drive for high torque application, this fastener ensures efficient installation and long-term performance in demanding environments, from production lines to structural frameworks.
Specification Summary & Compliance
This screw adheres to inch system dimensions with a Class 3A thread fit for precise UNC threading. It meets ASTM A574 specifications for high-strength alloy steel socket head cap screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental standards for global industrial use.
