S-91251A333 5/16"-24 x 3 3/4" 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 critical applications.
- Black-oxide coating on alloy steel enhances corrosion resistance and durability, extending service life in demanding industrial environments.
- Rockwell C37 hardness offers excellent wear resistance, maintaining structural integrity through repeated use and high torque.
- Partially threaded design with fine UNF spacing allows for precise clamping control and reduced loosening in dynamic loads.
- 1/4" hex drive socket head enables easy installation and removal with standard tools, improving assembly efficiency.
- Compliance with ASTM A574, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for safe, global use.
Professional Applications & Engineering Value
These socket head cap screws are engineered to address common industrial challenges, such as vibration-induced loosening and material fatigue. The black-oxide alloy steel construction provides enhanced corrosion protection, making them ideal for machinery, automotive, and aerospace applications where exposure to harsh conditions is frequent. The fine UNF thread spacing and Class 3A thread fit deliver superior holding power, minimizing maintenance needs in high-vibration environments. With a partially threaded rod and precise 1/4" hex drive, they facilitate quick, secure installations, reducing downtime and improving operational efficiency in B2B settings.
Specification Summary & Compliance
This product features a 5/16"-24 UNF thread size with Class 3A thread fit for high precision, and a partially threaded design with a minimum thread length of 1 1/8". It complies with ASTM A574 specifications for high-strength fasteners, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence in industrial use.
