S-93705A711 1/4"-28 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 a permanent nylon patch locking mechanism that maintains secure fastening in high-stress environments
• Excellent corrosion resistance provided by 18-8 stainless steel construction, ideal for harsh industrial conditions
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress
• Precise Class 3A thread fit delivers superior engagement and reduced risk of cross-threading during installation
• Wide temperature tolerance from -70° to 250°F allows consistent performance across diverse operating environments
• Standard hex drive compatibility enables easy installation with common tools while providing flush mounting capabilities
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for guaranteed quality and safety

Professional Applications & Engineering Value

This 1/4"-28 UNF nylon patch locking socket head cap screw delivers exceptional engineering value in applications where vibration-induced loosening poses significant reliability concerns. The permanent nylon patch locking mechanism creates consistent friction along the fine thread profile, effectively resisting rotational forces in machinery, automotive assemblies, and precision equipment. Manufactured from 18-8 stainless steel, this fastener combines corrosion resistance with the mechanical strength needed for demanding industrial environments. The Class 3A thread fit ensures precise engagement with mating components, reducing installation errors while the hex drive socket head provides reliable torque transmission in confined spaces. These characteristics make it particularly valuable for vibration-resistant fastening in manufacturing equipment, transportation systems, and electronic enclosures where long-term reliability is critical.

Specification Summary & Compliance

This socket head cap screw features precision 1/4"-28 UNF fine threads with Class 3A thread fit for superior dimensional accuracy and engagement. The fastener is manufactured according to ASME B18.3 specifications, ensuring consistent quality and performance. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming environmental safety and material restrictions adherence. The nylon patch locking system maintains effectiveness across the specified temperature range of -70° to 250°F, while the 18-8 stainless steel construction provides Rockwell B70 hardness and 70,000 psi tensile strength for demanding applications.