S-90002A101 1/4"-20 x 1/2" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
• Enhanced corrosion resistance through zinc yellow-chromate plating in demanding environments
• Superior hardness rating of Rockwell C33 prevents deformation under extreme pressure
• Precision threading with Class 2A UNC coarse threads for faster installation and reduced cross-threading risk
• Full-length threading provides consistent engagement across the entire fastener length
• Standard-compliant design meeting ASME B18.2.1 and SAE J429 for reliable performance
• External hex drive enables high-torque installation with common industrial tools

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver exceptional engineering value in heavy machinery, structural steel connections, and industrial equipment assembly. The steel construction combined with zinc yellow-chromate plating creates a robust barrier against corrosion while maintaining the 150,000 psi tensile strength required for critical load-bearing applications. The UNC coarse threading and Class 2A thread fit ensure rapid installation in various materials while minimizing the risk of thread stripping. Engineered to meet ASME B18.2.1 and SAE J429 specifications, these fully threaded 1/4"-20 fasteners provide reliable performance in construction, automotive, and manufacturing environments where failure is not an option.

Specification Summary & Compliance

This 1/4"-20 x 1/2" hex head screw features precision UNC coarse threads with Class 2A thread fit tolerance for consistent engagement. Manufactured to comply with ASME B18.2.1 dimensional standards and SAE J429 material specifications for Grade 8 fasteners. The product meets industry standards for heavy-duty applications with complete threading, right-hand thread direction, and external hex drive compatibility.