S-90343A137 1/4"-20 x 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 secure fastening in high-stress environments
• Exceptional corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh conditions
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress
• Precise Class 3A thread fit provides superior engagement and consistent clamping force in critical assemblies
• Wide temperature tolerance from -60° to 300°F maintains locking performance across extreme operating conditions
• Standard hex drive compatibility with 3/16" drive size allows for easy installation with common industrial tools
• Full thread coverage along the 2" length enables maximum adjustability and uniform load distribution

Professional Applications & Engineering Value

This socket head cap screw with permanent epoxy thread locker addresses critical industrial challenges where vibration loosening and thermal cycling compromise fastener integrity. The 18-8 stainless steel construction provides excellent corrosion resistance for demanding environments including marine applications, chemical processing equipment, and outdoor machinery. The UNC coarse thread design with Class 3A fit ensures rapid assembly and reliable performance in high-vibration machinery, automotive systems, and heavy equipment. The epoxy adhesive begins hardening within 15 minutes and reaches full strength in 24 hours, creating a permanent bond that eliminates the need for maintenance or retightening in inaccessible locations. This combination of material properties and locking technology delivers engineered solutions for applications where fastener failure is not an option.

Specification Summary & Compliance

This socket head cap screw features precision UNC 1/4"-20 coarse threads with Class 3A thread fit for superior engagement and consistent performance. Manufactured from 18-8 stainless steel with Rockwell B70 hardness, the fastener meets ASME B18.3 specifications for dimensional accuracy and mechanical properties. The permanent epoxy thread locker provides reliable performance across the specified temperature range from -60° to 300°F. The product complies with industry standards for quality and performance in industrial fastening applications.