S-92805A542 1/4"-20 x 1" ASME B18.3, ASTM F879, MIL-DTL-18240 Stainless Steel Thread-Locking Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant secure fastening with permanent nylon patch locking that maintains integrity across a wide temperature range (-65° to 250°F)
• Superior corrosion resistance through 18-8 stainless steel construction for extended service life in harsh environments
• High-torque installation capability with hex drive design providing secure tool engagement and reduced stripping risk
• Exceptional load-bearing capacity with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Precision thread engagement through Class 3A thread fit ensuring reliable performance in critical assemblies
• Optimized flush mounting with standard 82° countersink angle for smooth surface finishing
• Industry-standard compliance meeting ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications for guaranteed quality

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 1/4"-20 flat head screws with nylon patch locking technology provide reliable vibration resistance where constant motion or thermal cycling would compromise standard fasteners. The 18-8 stainless steel construction offers excellent corrosion resistance for outdoor equipment, marine environments, and chemical processing facilities. The hex drive configuration allows for high-torque installation without cam-out, while the fully threaded design ensures maximum grip length in various material thicknesses. These UNC coarse thread screws with Class 3A thread fit deliver precise engagement in metal assemblies, machinery, and structural frameworks where vibration-resistant locking is critical to operational safety and longevity.

Specification Summary & Compliance

These flat head screws feature precision UNC 1/4"-20 threads with Class 3A thread fit for superior dimensional accuracy. Manufacturing complies with ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications. The products are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility and regulatory adherence for global industrial applications.