S-90002A137 3/4"-10 x 3" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification

Key Features & Benefits at a Glance

• Exceptional strength for heavy-duty applications with Grade 8 rating and 150,000 psi tensile strength
• Superior corrosion resistance provided by zinc yellow-chromate plating for extended service life
• Reliable thread engagement with UNC coarse threads and Class 2A fit for consistent performance
• Optimized for high-torque applications featuring external hex drive and 1 1/8" head width
• Enhanced durability with Rockwell C33 hardness to withstand extreme industrial conditions
• Versatile partial threading design allowing for both clamping and alignment functions
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial environments where fastener failure is not an option. The combination of 150,000 psi tensile strength and Rockwell C33 hardness ensures reliable performance under extreme loads and vibration. The zinc yellow-chromate plating provides superior corrosion protection, making these 3/4"-10 UNC coarse thread screws ideal for construction equipment, heavy machinery, structural assemblies, and automotive applications. The partially threaded design offers precise clamping force control while the external hex drive and substantial head width facilitate high-torque installation without stripping. Engineered to meet ASME B18.2.1 standards, these industrial fasteners solve critical challenges in applications requiring maximum reliability and long-term performance.

Specification Summary & Compliance

This 3/4"-10 hex head screw features precise Class 2A thread fit with UNC coarse threading and right-hand direction. The fastener maintains dimensional accuracy per ASME B18.2.1 specifications and meets SAE J429 Grade 8 requirements with verified mechanical properties including 150,000 psi tensile strength and Rockwell C33 hardness. The zinc yellow-chromate finish provides corrosion resistance while the 3" length with 1 3/4" minimum thread length ensures proper engagement. Manufactured to industrial standards for reliable performance in critical applications.