S-90343A115 6-32 x 3/8" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• High-reliability fastening thanks to the Class 3A thread fit, ensuring precise, secure connections with minimal risk of loosening.
• Exceptional mechanical strength with a 70,000 psi tensile strength and Rockwell B70 hardness for demanding load-bearing applications.
• Permanent vibration resistance from the factory-applied epoxy thread locker, which cures to full strength to prevent back-out.
• Broad thermal performance with a thread locker that remains effective from -60° to 300° F, suitable for extreme temperature cycles.
• Optimized for high-torque installation using the standard hex socket (7/64" drive), providing a secure grip and reducing tool slippage.
• Guaranteed dimensional consistency and interchangeability as it meets the stringent ASME B18.3 specification.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to address critical challenges in precision assembly and machinery. The 18-8 Stainless Steel material provides excellent resistance to oxidation and corrosion, making it a reliable choice for outdoor equipment, marine components, and chemical processing units. The 6-32 UNC coarse thread and Class 3A fit ensure rapid assembly with high clamping force, reducing installation time while maintaining joint integrity. The integrated epoxy thread locker is a key differentiator, offering a permanent locking solution that eliminates the need for secondary adhesives in applications subject to intense vibration, such as automotive subsystems, industrial robots, and aerospace fixtures. Its fully threaded design allows for uniform stress distribution, enhancing the screw’s performance in high-stress mechanical linkages.

Specification Summary & Compliance

This screw features a 6-32 UNC coarse thread with a Class 3A thread fit for superior dimensional accuracy. It is fully threaded, right-hand direction, with a length of 3/8 inch and a standard socket head profile. Manufacturing and quality are controlled per ASME B18.3, ensuring consistent performance. The epoxy thread locker begins to harden in 15 minutes and reaches full strength in 24 hours. The product is compliant with RoHS and REACH environmental directives.