S-90343A120 8-32 x 1/2" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with epoxy thread locker that maintains integrity from -60° to 300°F, eliminating loosening in high-stress applications
• Superior corrosion resistance from 18-8 stainless steel construction, ensuring longevity in harsh industrial environments
• Precise thread engagement with Class 3A UNC coarse threads, providing reliable fastening and reduced cross-threading risks
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness, supporting heavy-duty operational demands
• Secure hex drive installation using 9/64" drive size, enabling high torque application without slippage in confined spaces
• Full-threaded design for maximum grip length and uniform stress distribution across the entire fastener
• Industry-standard compliance with ASME B18.3 specifications, guaranteeing interchangeability and consistent performance

Professional Applications & Engineering Value

Engineered for demanding industrial applications where vibration-induced failure is a critical concern, these 18-8 stainless steel socket head cap screws deliver reliable performance through their integrated epoxy thread locking system. The UNC coarse threads with Class 3A fit ensure rapid assembly and superior resistance to dynamic loads, while the hex socket drive accommodates high-torque installation in space-constrained machinery. Ideal for permanent fastening in automotive assemblies, heavy equipment, and precision manufacturing systems, these screws eliminate the need for secondary locking components, reducing assembly time and maintenance costs. Their corrosion-resistant properties make them suitable for outdoor, marine, and chemical processing environments where fastener integrity is paramount.

Specification Summary & Compliance

This 8-32 UNC threaded socket head cap screw features Class 3A thread fit with coarse thread spacing and right-hand thread direction. Manufactured to meet ASME B18.3 specifications for dimensional accuracy and performance consistency. The fully threaded rod design ensures complete engagement, while the epoxy adhesive thread locker begins hardening in 15 minutes and reaches full strength within 24 hours. Compliant with industry standards for mechanical properties and material composition.