S-90117A633 3/8"-16 x 2 1/4" ASME B18.3 Alloy Steel Wire-Lockable Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (170,000 psi) ensures reliable performance in high-stress applications, reducing the risk of fastener failure
• Black-oxide coating on alloy steel provides enhanced corrosion resistance for extended service life in demanding industrial environments
• Class 3A thread fit delivers superior precision and consistent engagement for secure fastening in critical assemblies
• Hex socket drive design allows for high-torque installation and removal while minimizing head protrusion in confined spaces
• Partially threaded shank provides optimal grip length control and prevents thread damage during installation
• Wire locking capability offers additional security against vibration-induced loosening in dynamic applications
• ASME B18.3 compliance guarantees dimensional accuracy and interchangeability with standard components

Professional Applications & Engineering Value

These 3/8"-16 UNC socket head cap screws deliver critical engineering advantages for industrial applications where reliability and precision are paramount. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining the 170,000 psi tensile strength required for heavy machinery, automotive assemblies, and industrial equipment. The coarse UNC thread design ensures rapid installation and superior resistance to vibration loosening, while the partially threaded configuration allows for precise clamping force distribution. The hex socket drive enables high-torque applications without stripping concerns, making these fasteners ideal for maintenance-critical environments where durability and performance cannot be compromised.

Specification Summary & Compliance

This socket head cap screw features precise Class 3A thread fit tolerances with 3/8"-16 UNC coarse threads in right-hand orientation. Manufactured to ASME B18.3 specifications for dimensional accuracy, the fastener demonstrates Rockwell C37 hardness and meets stringent regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance. The inch-system measurements ensure compatibility with standard industrial equipment and replacement protocols.