S-91205A618 3/8"-16 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
- Superior vibration resistance with Nylon Patch thread locker that maintains integrity from -70° to 250°F, preventing loosening in dynamic applications
- Exceptional tensile strength rated at 170,000 psi for reliable performance in high-stress industrial assemblies
- Enhanced durability through Rockwell C37 hardness and Black-Oxide Alloy Steel construction resisting corrosion and wear
- Precise Class 3A thread fit ensures tight tolerances and secure mating with UNC coarse threads for faster assembly
- Optimized drive engagement with 5/16" hex socket allowing high torque application without stripping
- Full compliance with ASME B18.3 and ASTM A574 standards guaranteeing dimensional accuracy and material consistency
- Environmentally responsible design meeting RoHS 3 and REACH regulations for safe usage in regulated industries
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these socket head cap screws deliver critical reliability where vibration and thermal cycling compromise fastener integrity. The Black-Oxide Alloy Steel provides corrosion resistance while the Nylon Patch thread locker actively counters vibrational loosening without requiring secondary adhesives. With 170,000 psi tensile strength and Class 3A UNC coarse threads, these fasteners maintain clamp force in heavy machinery, automotive assemblies, and precision equipment. The combination of fully threaded design and hex socket drive enables uniform stress distribution and easy installation in confined spaces, solving common challenges in maintenance and production lines.
Specification Summary & Compliance
Manufactured to ASME B18.3 dimensional standards with ASTM A574 material specifications. Features Class 3A thread fit for precision engagement with UNC coarse threads (3/8"-16). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Temperature rating maintained from -70° to 250°F with consistent performance across industrial operating conditions.
