S-90343A118 6-32 x 3/4" 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 reducing replacement frequency.
• High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness, ensuring reliable load-bearing capacity.
• Permanent vibration resistance through integrated epoxy thread locker, preventing loosening in dynamic applications from -60° to 300°F.
• Precise thread engagement with Class 3A thread fit and UNC coarse threads, enabling faster assembly and reduced cross-threading risk.
• Optimized drive stability using a standard hex socket and 7/64" drive size, providing secure torque transmission and minimal tool slippage.
• Full-threaded design along the 3/4" length, offering consistent clamping force and versatile positioning in assemblies.
• Industry-standard compliance with ASME B18.3 specifications, guaranteeing dimensional accuracy and interchangeability.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address critical challenges in industrial fastening, where vibration, thermal cycling, and corrosion can compromise joint integrity. The 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, extending service life in machinery, automotive, and outdoor equipment. The epoxy thread locker cures to full strength within 24 hours, creating a permanent bond that eliminates the need for maintenance or re-tightening in high-stress environments. Combined with the Class 3A thread fit and UNC coarse thread profile, it ensures rapid, accurate installation—reducing assembly time and improving production efficiency. This makes it a trusted solution for securing critical components in engines, conveyor systems, and precision instruments.

Specification Summary & Compliance

This screw features a Class 3A thread fit for tight tolerances and a UNC coarse thread (6-32 size) with right-hand direction. It is fully threaded and meets ASME B18.3 dimensional standards. The epoxy adhesive thread locker begins hardening in 15 minutes and reaches full cure in 24 hours, operating effectively within a temperature range of -60° to 300°F. Manufactured from 18-8 stainless steel, it complies with industry specifications for reliability and performance in demanding applications.