S-90019A470 1/2"-13 x 1 3/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Thread-Locking Hex Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant performance with permanent Nylon Patch thread locker that prevents loosening under dynamic loads
• Exceptional strength for heavy-duty applications with Grade 8 classification and 150,000 psi tensile strength
• Superior corrosion protection through zinc yellow-chromate plating for extended service life in harsh environments
• Reliable operation across extreme temperatures from -55°F to 250°F without compromising locking performance
• Precision threading for secure fastening with UNC coarse threads and Class 2A fit ensuring consistent engagement
• Optimized installation efficiency using standard external hex drive for high-torque applications
• Full thread coverage along the 1-3/4" length provides maximum grip and load distribution

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Grade 8 hex head screws with Nylon Patch locking deliver critical vibration resistance in heavy machinery, construction equipment, and automotive assemblies. The zinc yellow-chromate plated steel construction provides superior corrosion protection while maintaining Rockwell C33 hardness for durability. The UNC coarse thread design ensures rapid installation and reliable performance in high-vibration applications where fastener integrity is paramount. These fully threaded fasteners maintain consistent clamping force across the entire engagement length, making them ideal for structural connections subjected to dynamic loading conditions.

Specification Summary & Compliance

Manufactured to ASME B18.2.1 and SAE J429 specifications with Class 2A thread fit tolerance. Features 1/2"-13 UNC coarse threads and meets industry standards for dimensional accuracy. The Grade 8 classification guarantees 150,000 psi tensile strength and Rockwell C33 hardness for maximum reliability in critical applications.