S-90343A129 1/4"-20 x 3/8" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with pre-applied epoxy thread locker that prevents loosening under dynamic loads
• Exceptional temperature performance maintaining integrity from -60°F to 300°F for extreme environment applications
• Premium corrosion resistance through 18-8 stainless steel construction for long service life in harsh conditions
• Precision Class 3A thread fit ensuring consistent engagement and reliable clamping force in critical assemblies
• High-strength fastening solution with 70,000 PSI tensile strength and Rockwell B70 hardness for demanding applications
• Optimized installation efficiency featuring standard hex drive design for secure tool engagement and torque transmission
• Rapid curing thread locker that begins hardening in 15 minutes and reaches full strength within 24 hours

Professional Applications & Engineering Value

These socket head cap screws with epoxy thread locker provide engineered solutions for vibration-prone industrial applications where fastener security is critical. The 18-8 stainless steel construction offers excellent corrosion resistance for machinery exposed to moisture, chemicals, or outdoor elements. The Class 3A thread fit and UNC coarse threading ensure reliable engagement in high-vibration environments common in automotive, aerospace, and heavy equipment manufacturing. The pre-applied thread locking adhesive eliminates the need for separate application, reducing assembly time while providing permanent locking security that withstands extreme temperature fluctuations from -60°F to 300°F, making these fasteners ideal for engine components, industrial machinery, and structural assemblies where maintenance access is limited.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with precision Class 3A thread fit for superior dimensional accuracy. Features 1/4"-20 UNC coarse threads with right-hand orientation and fully threaded design. The epoxy thread locker provides permanent locking capability with temperature resistance from -60°F to 300°F. Mechanical properties include 70,000 PSI tensile strength and Rockwell B70 hardness for high-strength applications. Compliant with industry standards for dimensional accuracy and performance requirements in industrial fastening systems.