S-90665A157 1/4"-20 x 5/8" ASTM A574 Alloy Steel Low-Profile Socket Head Screws
Alloy Steel Low-Profile 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 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Corrosion-resistant zinc plating on alloy steel provides enhanced durability and longevity in harsh industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections for critical assembly applications.
- Low-profile socket head design allows for installation in tight spaces while offering superior torque transmission with a hex drive.
- Fully threaded shank enables uniform load distribution and consistent clamping force across the entire length.
- High Rockwell C39 hardness maintains thread integrity and resists wear during repeated use.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
This zinc-plated alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration loosening and corrosion in demanding applications. The UNC coarse thread design facilitates quick assembly and disassembly, while the Class 3A fit provides tight tolerances for precision machinery, automotive components, and heavy equipment. Its low-profile head and hex drive allow for efficient installation in confined spaces, reducing assembly time. With a tensile strength of 140,000 psi and high hardness, it offers reliable performance in structural frameworks, manufacturing jigs, and other high-stress environments where fastener integrity is critical.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-20 UNC coarse thread with Class 3A fit for precise dimensional accuracy. It is manufactured in accordance with 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, supporting environmentally responsible sourcing and usage in industrial applications.
