S-91251A576 5/16"-18 x 3/8" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
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.
- Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- 1/4" hex drive design allows for easy installation and high torque application with standard tools.
- Fully threaded body ensures consistent clamping force along the entire length for uniform load distribution.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global applications.
Professional Applications & Engineering Value
Engineered for demanding environments, these Black-Oxide Alloy Steel Socket Head Cap Screws deliver outstanding durability and corrosion resistance, making them ideal for machinery, automotive, and heavy equipment assemblies. The UNRC coarse thread and Class 3A fit ensure quick installation and reliable performance in high-vibration settings, minimizing loosening over time. With a 170,000 psi tensile strength and Rockwell C37 hardness, they withstand extreme loads and wear, reducing maintenance needs and downtime. The fully threaded design provides consistent engagement, while the 1/4" hex drive facilitates efficient assembly in confined spaces, enhancing productivity in industrial fastener applications.
Specification Summary & Compliance
This 5/16"-18 x 3/8" socket head cap screw features a Class 3A thread fit with UNRC coarse threads and right-hand thread direction, ensuring precise dimensional accuracy per inch system standards. Manufactured in compliance with ASTM A574 for material consistency, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable use in global industrial applications.
