S-91205A630 3/8"-16 x 1 3/4" 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 vibration resistance with integrated nylon patch thread locker that prevents loosening under dynamic loads
- Superior corrosion protection through black-oxide surface treatment, extending service life in harsh environments
- High tensile strength of 170,000 psi ensures reliable performance in demanding structural applications
- Precise Class 3A thread fit provides consistent engagement and reduces assembly issues
- Wide temperature tolerance from -70°F to 250°F maintains integrity across industrial operating conditions
- Optimized drive engagement with 5/16" hex socket for secure torque transmission and reduced stripping risk
- Partial threading design allows for precise clamping force control in assembled components
Professional Applications & Engineering Value
Engineered for critical assembly applications where vibration resistance and corrosion protection are paramount, these socket head cap screws deliver exceptional performance in machinery, automotive, and heavy equipment sectors. The black-oxide alloy steel construction combined with Rockwell C37 hardness provides durability against wear and environmental exposure. The nylon patch thread locker effectively counters vibrational loosening in dynamic systems, while the UNC coarse thread profile ensures rapid installation and reliable engagement in industrial socket screw applications. These partially threaded fasteners offer precise clamping control where full threading isn't required, making them ideal for precision assemblies requiring both high tensile strength and vibration management.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with ASTM A574 material standards, these screws feature Class 3A thread fit for precision engagement. The UNC 3/8"-16 coarse thread configuration ensures compatibility with standard components. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, these fasteners meet international standards for industrial use while maintaining dimensional accuracy across the specified temperature range of -70°F to 250°F.
