S-93705A544 1/4"-20 x 1 1/4" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch locking that maintains secure fastening in high-vibration environments
• Superior corrosion resistance from 18-8 stainless steel construction for long-lasting performance in harsh conditions
• High-strength reliability with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Wide temperature tolerance from -70° to 250°F, ensuring consistent performance across extreme thermal conditions
• Precise thread engagement with Class 3A UNC coarse threads for superior fit and reduced cross-threading risk
• Secure hex drive installation using standard 3/16" hex tools for reliable torque transmission and reduced stripping
• Industry compliance assurance meeting ASME B18.3 standards and environmental regulations for quality and safety

Professional Applications & Engineering Value

These nylon patch lock socket head cap screws provide critical vibration resistance in demanding industrial applications where loosening under dynamic loads poses significant safety and performance risks. The 18-8 stainless steel construction offers excellent corrosion resistance for machinery exposed to moisture, chemicals, or outdoor elements, while the UNC coarse thread design ensures rapid assembly and superior holding power in various materials. The Class 3A thread fit guarantees precise engagement with mating components, reducing installation errors and improving joint integrity. Ideal for automotive assemblies, industrial equipment, and precision machinery, these socket head screws maintain their locking capability across a broad temperature range from -70° to 250°F, making them suitable for applications subject to thermal cycling without compromising fastener security.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy and consistent performance. The UNC coarse thread (1/4"-20) ensures proper engagement while the partially threaded design provides optimal clamping force distribution. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming these fasteners meet stringent international standards for hazardous substance restrictions and chemical safety in industrial applications.