S-92620A612 5/16"-24 x 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 Grade 8 steel construction and 150,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh industrial environments
• Precise thread engagement with UNF fine threading and Class 2A fit ensuring consistent, vibration-resistant connections
• Optimized torque transmission via external hex drive design that prevents tool slippage during installation
• Full-length threading provides maximum grip length and uniform stress distribution across the entire fastener
• Certified quality assurance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed dimensional accuracy and performance
• Enhanced durability with Rockwell C33 hardness that maintains structural integrity under repeated stress cycles

Professional Applications & Engineering Value

These Grade 8 steel hex head screws deliver critical performance in heavy machinery, automotive assemblies, and structural frameworks where high tensile strength and vibration resistance are paramount. The UNF fine threading with Class 2A fit ensures precise alignment and maintains clamping force in dynamic load conditions, while the zinc yellow-chromate plating provides robust corrosion protection against industrial atmospheres and chemical exposure. The external hex drive design facilitates efficient installation with standard tools, making these fully threaded screws ideal for applications requiring uniform load distribution across the entire fastener length in construction equipment, manufacturing fixtures, and transportation systems.

Specification Summary & Compliance

Manufactured to exact Class 2A thread fit tolerances with UNF fine thread specifications (5/16"-24 thread size). Complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. Features include 2" length, 1/2" head width, right-hand thread direction, and full threading. The Grade 8 classification guarantees 150,000 psi minimum tensile strength and Rockwell C33 hardness for industrial-grade performance requirements.