S-90002A136 3/4"-10 x 2 1/2" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
• High-strength Grade 8 classification ensures consistent performance under extreme mechanical stress
• Precise Class 2A thread fit provides smooth installation and secure fastening without galling
• Coarse UNC threading offers faster assembly and reduced cross-threading risks in industrial settings
• Full threading along the 2½" length allows for maximum adjustability and grip in various material thicknesses
• External hex drive design enables high-torque installation with standard tools for efficient maintenance

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering advantages for heavy machinery, structural steel connections, and industrial equipment assembly. The Rockwell C33 hardness combined with 150,000 psi tensile strength provides exceptional resistance to vibration loosening and mechanical fatigue. The zinc yellow-chromate plating creates a robust barrier against corrosion in outdoor or chemically aggressive environments, significantly reducing maintenance frequency. The 3/4"-10 UNC coarse thread configuration ensures rapid installation in structural steel, heavy fabrications, and equipment bases where time-efficient assembly is crucial. These fully threaded heavy-duty bolts maintain clamping force integrity in high-vibration applications across construction, manufacturing, and transportation sectors.

Specification Summary & Compliance

Manufactured to exacting Class 2A thread fit tolerances with UNC coarse threading (3/4"-10) and right-hand thread direction. Complies with ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. Features include 1⅛" head width, 15/32" head height, and external hex drive configuration. The zinc yellow-chromate plating provides RoHS-compliant corrosion protection while maintaining the 150,000 psi tensile strength and Rockwell C33 hardness required for critical industrial fastening applications.