S-90602A246 5/16"-18 x 2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Grade 8 strength rating and 150,000 psi tensile strength for critical structural applications
• Superior corrosion protection through zinc yellow-chromate plating that withstands harsh industrial environments
• Enhanced stability and distribution from the integrated flange design that eliminates need for separate washers
• Reliable thread engagement with UNC coarse threads and Class 2A fit ensuring consistent performance in vibration-prone applications
• Optimized partial threading providing unthreaded shank section for improved shear strength where needed
• Industry-standard compliance meeting IFI 111/SAE J429 specifications for guaranteed quality and interchangeability
• Easy installation and removal with standard external hex drive compatible with common wrench sizes

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value in heavy machinery, construction equipment, and automotive assemblies where high tensile strength and vibration resistance are critical. The zinc yellow-chromate plated steel construction provides superior corrosion protection in outdoor or chemically aggressive environments, while the partially threaded design with UNC coarse threads ensures optimal clamping force distribution. The integrated flange eliminates washer requirements, streamlining assembly processes in tight spaces. Engineered to withstand extreme mechanical stresses, this fastener maintains Rockwell C32 hardness under continuous load conditions, making it ideal for structural connections, equipment frames, and high-vibration industrial applications where failure is not an option.

Specification Summary & Compliance

This 5/16"-18 UNC coarse thread hex head screw features Class 2A thread fit tolerances for consistent engagement and meets IFI 111 specifications where identified as SAE J429 compliant. The fastener maintains dimensional accuracy with 2" length and 7/8" minimum thread length, ensuring reliable performance in demanding applications. Manufactured from high-strength steel with zinc yellow-chromate plating for corrosion resistance, this heavy-duty fastener delivers guaranteed mechanical properties including 150,000 psi tensile strength and Rockwell C32 hardness as specified under SAE J429 standards for Grade 8 fasteners.