S-93705A124 4-40 x 1/2" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking: Permanent nylon patch thread locker prevents loosening under dynamic loads, ensuring reliable performance in high-stress environments.
• Exceptional corrosion resistance: Made from 18-8 stainless steel for long-lasting durability in harsh or corrosive industrial settings.
• High-strength construction: Withstands up to 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications.
• Precise thread engagement: Class 3A thread fit and UNC coarse threading provide secure, accurate fastening with reduced cross-threading risk.
• Wide temperature tolerance: Nylon locker functions from -70° to 250°F, maintaining integrity across diverse operating conditions.
• Standardized compatibility: Hex socket drive and ASME B18.3 compliance ensure easy installation and interchangeability.
• Full-threaded design: Maximizes grip length and load distribution for enhanced joint stability.

Professional Applications & Engineering Value

Engineered for precision and reliability, these 4-40 UNC thread socket head cap screws address critical industrial challenges like vibration-induced fastener failure and environmental degradation. The 18-8 stainless steel material offers excellent resistance to rust and chemicals, ideal for machinery, automotive assemblies, and electronic enclosures exposed to moisture or corrosive agents. The integrated nylon patch thread locker secures joints without requiring additional adhesives, simplifying assembly while providing permanent vibration resistance. With a coarse thread spacing and Class 3A fit, these screws enable quick installation and high clamp force retention, reducing maintenance downtime in industrial fastening systems. Their fully threaded design ensures uniform stress distribution, enhancing structural integrity in high-load applications.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with Class 3A precision fit for accurate engagement. Manufactured to ASME B18.3 specifications, it guarantees dimensional consistency and performance reliability. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and restricted substance adherence, supporting sustainable procurement practices.