S-91205A619 3/8"-16 x 5/8" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws
Alloy Steel Thread-Locking 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
- Vibration-resistant locking with nylon patch thread locker prevents loosening in high-stress applications, ensuring long-term assembly integrity.
- Exceptional tensile strength of 170,000 psi provides reliable performance in heavy-duty and high-load environments.
- Corrosion-resistant black-oxide finish on alloy steel enhances durability and extends service life in harsh industrial conditions.
- Precise Class 3A thread fit ensures smooth installation and superior engagement, reducing the risk of cross-threading.
- Wide temperature tolerance from -70° to 250°F maintains fastener performance across diverse operating environments.
- High hardness (Rockwell C37) offers excellent wear resistance and minimizes deformation under torque.
- Standard hex drive compatibility with 5/16" drive size allows for easy installation using common tools.
Professional Applications & Engineering Value
Engineered for demanding applications, this Black-Oxide Alloy Steel Socket Head Cap Screw with Nylon Patch thread locker addresses critical challenges in machinery, automotive, and heavy equipment assembly. The UNC coarse thread and Class 3A fit provide rapid installation and secure fastening, reducing assembly time while preventing vibration-induced failures. Its high tensile strength and robust material composition ensure reliable performance under dynamic loads, making it ideal for structural frames, engine components, and industrial fixtures where safety and precision are paramount. The combination of corrosion resistance and temperature stability further enhances its suitability for outdoor and high-temperature environments, delivering consistent engineering value across various sectors.
Specification Summary & Compliance
This socket head cap screw features a 3/8"-16 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy. It is manufactured in compliance with ASME B18.3 and 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, meeting environmental and safety standards for industrial use.
