S-91205A634 3/8"-16 x 2 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 vibration resistance with integrated nylon patch thread locker, maintaining secure fastening in temperatures from -70° to 250° F
- Superior tensile strength rated at 170,000 psi for reliable performance in high-stress industrial applications
- Enhanced corrosion protection through black-oxide coating on alloy steel, extending service life in demanding environments
- Precise thread engagement with Class 3A UNC coarse threads ensuring consistent, reliable connections
- Optimized drive efficiency featuring standard hex socket head for high torque application without cam-out
- Reduced assembly complexity with partially threaded design providing both gripping and clearance functions
- Regulatory compliance assurance meeting ASME B18.3 specifications and international environmental standards
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these socket head cap screws deliver critical vibration resistance where machinery integrity is paramount. The black-oxide alloy steel construction provides superior corrosion protection while maintaining Rockwell C37 hardness for exceptional durability. The nylon patch thread locker technology prevents loosening under extreme vibration conditions, making these fasteners ideal for automotive assemblies, heavy equipment manufacturing, and precision machinery. With UNC coarse threads and Class 3A thread fit, installation efficiency is maximized while ensuring reliable, consistent clamping force in high-vibration environments where fastener failure is not an option.
Specification Summary & Compliance
This 3/8"-16 x 2 1/2" socket head cap screw features precision Class 3A thread fit with UNC coarse thread profile and minimum thread length of 1-1/2". Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, the fastener delivers consistent dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets while maintaining 170,000 psi tensile strength performance standards.
