S-92620A343 1 1/2"-6 x 5 1/2" 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 150,000 psi tensile strength for reliable performance in high-stress environments.
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial conditions.
• High hardness rating of Rockwell C33 ensures excellent wear resistance and durability under repeated use.
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and reduced cross-threading risk.
• Secure external hex drive allows for high torque application with standard tools, preventing slippage during installation.
• Partially threaded design provides unthreaded shank strength where needed while maintaining full thread engagement.
• Full regulatory compliance with ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for guaranteed quality and safety.

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The zinc yellow-chromate plated steel construction provides exceptional corrosion protection in demanding environments like manufacturing plants, construction sites, and outdoor installations. The 1 1/2"-6 UNC coarse thread configuration ensures rapid installation and superior vibration resistance, while the external hex drive accommodates high-torque applications without stripping. With 150,000 psi tensile strength and Rockwell C33 hardness, this fastener maintains integrity under extreme mechanical stress, preventing joint failure in critical applications. The partially threaded design concentrates strength where needed most, making it ideal for heavy-duty bolting scenarios requiring both clamping force and shear resistance.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with 1 1/2"-6 UNC coarse threading and partial threading configuration. This hex head screw strictly adheres to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing safe use across various industrial sectors.