S-93705A537 1/4"-20 x 1/2" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch thread locker that maintains secure fastening in dynamic environments from -70° to 250°F
• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications
• Precise thread engagement with Class 3A UNC coarse threads ensuring reliable installation and consistent clamping force
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B70 hardness for demanding mechanical applications
• Secure hex drive installation with 3/16" drive size providing positive torque transmission and reduced tool slippage
• Industry-standard compliance meeting ASME B18.3 specifications for dimensional accuracy and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH standards for safe use across global markets

Professional Applications & Engineering Value

Engineered for critical assembly applications where vibration resistance and corrosion protection are paramount, these 18-8 stainless steel socket head cap screws provide reliable fastening solutions for machinery, automotive components, and industrial equipment. The UNC coarse thread design with Class 3A fit ensures quick installation and superior thread engagement, while the permanent nylon patch thread locker eliminates the need for additional locking hardware. The hex socket drive allows for high-torque installation in confined spaces, making these temperature-resistant fasteners ideal for applications ranging from manufacturing equipment to outdoor structures where environmental factors and mechanical stress demand durable, maintenance-free performance.

Specification Summary & Compliance

This socket head cap screw features precise 1/4"-20 UNC coarse threads with Class 3A tolerance for superior fit and right-hand thread direction. Manufactured to ASME B18.3 standards for dimensional accuracy, the fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial applications while maintaining 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance in demanding conditions.