S-91286A483 3/4"-10 x 6" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 classification and 150,000 PSI tensile strength for reliable performance in high-stress environments.
• Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh industrial conditions.
• Optimized torque application through the external hex drive and 1 1/8" head width, ensuring secure fastening with standard tools.
• Enhanced durability from Rockwell C33 hardness, maintaining structural integrity under repetitive loads and vibrations.
• Efficient coarse threading (UNC) with Class 2A fit for quick installation and reduced cross-threading risks in coarse-alignment applications.
• Versatile partial threading design allowing unthreaded shank sections to bear shear forces without compromising thread engagement.
• Regulatory peace of mind with compliance to ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global industrial use.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in construction, machinery assembly, and structural frameworks where high tensile strength and vibration resistance are paramount. The zinc-flake coated steel construction combats corrosion in outdoor or chemically exposed environments, while the coarse UNC threading ensures rapid installation in thick materials like steel plates or structural members. With partial threading, the design prevents thread damage in shear zones and maintains clamp load integrity under dynamic stresses. Ideal for external hex drive systems requiring high torque values, this fastener delivers consistent performance in automotive, agricultural, and heavy equipment sectors where ASME B18.2.1 and SAE J429 compliance is mandatory for safety-critical connections.

Specification Summary & Compliance

This 3/4"-10 UNC hex head screw maintains precise Class 2A thread fit tolerances for consistent engagement, with a minimum thread length of 1 3/4" on the 6" overall length. Manufactured to ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions adherence for global supply chain integration.