S-91205A596 5/16"-24 x 1/2" 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
- Exceptional holding power with 170,000 psi tensile strength for reliable performance in high-stress applications.
- Vibration-resistant locking provided by the Nylon Patch thread locker, maintaining fastener integrity from -70° to 250°F.
- Precise, fine-thread engagement with Class 3A thread fit for superior clamping force and reduced loosening risk.
- Corrosion-resistant black-oxide finish on alloy steel for enhanced durability in demanding industrial environments.
- High-strength construction with Rockwell C37 hardness, ensuring long-term wear resistance and dimensional stability.
- Secure, recessed hex drive (1/4") allows for high-torque installation and a clean, flush-mounted appearance.
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring material safety and international specification adherence.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in precision assembly and heavy-duty machinery. The UNF fine thread with Class 3A fit provides superior resistance to vibrational loosening, making it ideal for automotive, aerospace, and industrial equipment where joint integrity is paramount. The Nylon Patch thread locker offers a reliable, chemical-free locking mechanism that performs across a wide temperature range (-70° to 250°F), eliminating the need for separate locking washers or adhesives. Combined with the 170,000 psi tensile strength and corrosion-resistant finish, this socket head cap screw delivers exceptional value in applications requiring both high clamping force and long-term environmental durability.
Specification Summary & Compliance
This fastener maintains Class 3A thread tolerances for precision fit and is manufactured to ASME B18.3 specifications (ASTM A574 material). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to international environmental and safety standards for industrial components.
