S-90019A480 1/2"-13 x 2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Thread-Locking Hex Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch thread locker maintains secure fastening in temperatures from -55° to 250°F, preventing loosening in dynamic environments.
• Exceptional tensile strength of 150,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure.
• High durability and corrosion resistance from zinc yellow-chromate plated steel protects against rust and extends service life in harsh conditions.
• Easy installation and removal with external hex drive and coarse UNC threads allows for quick assembly and disassembly with standard tools.
• Precision threading with Class 2A fit provides consistent engagement and reduces cross-threading issues for smoother installations.
• Heavy-duty Grade 8 classification and Rockwell C33 hardness offer superior strength and wear resistance for demanding industrial applications.
• Partial threading design enables optimal clamping force distribution, ideal for components requiring precise unthreaded shank sections.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration and high stress are common. The nylon patch thread locker effectively counters loosening from dynamic loads, while the zinc yellow-chromate plating on steel provides a robust barrier against corrosion, ensuring longevity in outdoor or chemically exposed settings. With its coarse UNC thread and external hex drive, it simplifies maintenance in tight spaces, reducing downtime. Ideal for structural frames, engine components, and industrial equipment, this fastener delivers reliable performance under 150,000 psi tensile strength, meeting rigorous standards for safety and efficiency in B2B procurement.

Specification Summary & Compliance

This product adheres to Class 2A thread fit for consistent dimensional accuracy and features UNC coarse threading with a 1/2"-13 size. It complies with ASME B18.2.1 and SAE J429 specifications, ensuring manufacturing consistency and reliability. The zinc yellow-chromate plating meets common industry requirements for corrosion resistance, while the design supports use in applications demanding high-strength fasteners without additional regulatory claims such as RoHS or REACH unless specified in custom orders.