S-92620A849 3/4"-10 x 3 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 industrial applications.
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments.
• High hardness rating of Rockwell C33 ensures excellent wear resistance and durability under repetitive use.
• Easy installation and removal with external hex drive and 1 1/8" head width for secure tool engagement.
• Reliable thread engagement through UNC coarse threading and Class 2A fit, preventing cross-threading in assembly operations.
• Full threading along the 3 1/2" length allows for maximum adjustment flexibility and secure fastening in various material thicknesses.
• Compliance with major industry standards including ASME B18.2.1 and SAE J429, ensuring consistent quality and interchangeability.

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where failure is not an option. The combination of high-strength steel material and zinc yellow-chromate plating addresses common industrial challenges including vibration-induced loosening, environmental corrosion, and extreme load conditions. The UNC coarse thread configuration provides superior holding power in softer materials and faster installation in production environments. Engineers specify this fully threaded fastener for applications requiring maximum clamp force distribution, such as construction equipment frames, manufacturing machinery bases, and transportation infrastructure where 150,000 PSI tensile strength ensures structural integrity under dynamic loads.

Specification Summary & Compliance

This hex head screw maintains precise Class 2A thread fit tolerances according to ASME B18.2.1 specifications, ensuring consistent performance across applications. The fastener conforms to SAE J429 Grade 8 requirements for mechanical properties and dimensional standards. Manufacturing compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted substances. The product features 3/4"-10 UNC coarse threads with right-hand direction and meets all specified dimensional parameters including 1/2" head height and 1 1/8" head width for standardized tool compatibility.