S-90665A159 1/4"-20 x 7/8" ASTM A574 Alloy Steel Low-Profile Socket Head Screws
Alloy Steel Low-Profile 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 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Superior corrosion resistance provided by the zinc-plated alloy steel material, extending service life in demanding industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections and easier assembly with consistent engagement.
- Low-profile socket head design allows for installation in confined spaces while providing ample torque transfer with a hex key.
- Fully threaded shank offers maximum grip length and uniform clamping force across the entire engagement area.
- High hardness rating of Rockwell C39 enhances wear resistance and maintains thread integrity during repeated use.
- Compliance with ASTM A574 and environmental standards ensures consistent quality and safe use in regulated industries.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 1/4"-20 UNC Socket Head Cap Screws provide a robust fastening solution where space constraints and high strength are critical. The zinc-plated alloy steel construction offers excellent corrosion protection, making them ideal for machinery, automotive assemblies, and outdoor equipment exposed to harsh conditions. The coarse thread and Class 3A fit ensure quick installation and reliable performance in vibrating environments, reducing maintenance needs. With a low-profile socket head and hex drive, they enable efficient torque application in tight spaces, streamlining assembly processes while meeting rigorous ASTM A574 specifications for quality and durability.
Specification Summary & Compliance
This fastener features a 1/4"-20 UNC coarse thread with a Class 3A thread fit for precise tolerance, ensuring secure connections. Manufactured in accordance with ASTM A574 specifications, it guarantees consistent performance and material integrity. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in environmentally sensitive applications without hazardous substances.
