S-90602A272 3/4"-10 x 2 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life, minimizing maintenance and replacement costs in harsh environments.
• High hardness rating (Rockwell C32) provides excellent wear resistance, maintaining thread integrity and dimensional stability over time.
• Flanged head design eliminates the need for separate washers, offering wider bearing surface for better load distribution and faster installation.
• Coarse UNC threading with Class 2A fit enables quick assembly and superior vibration resistance, ideal for heavy machinery and structural applications.
• Full threading along the 2 1/2" length allows for maximum adjustability and secure fastening across varying material thicknesses.
• External hex drive with 1 1/8" head width facilitates high-torque installation using standard tools, improving efficiency in industrial settings.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Grade 8 hex head screws deliver critical performance where failure is not an option. The zinc yellow-chromate plated steel construction provides a durable barrier against corrosion, making them suitable for outdoor equipment, construction machinery, and manufacturing facilities exposed to moisture and chemicals. The coarse UNC thread pattern maintains holding power in soft materials and resists loosening under vibration, while the flanged design distributes clamping force effectively across joined surfaces. With 150,000 psi tensile strength and Rockwell C32 hardness, these fully threaded fasteners withstand extreme mechanical stress in heavy-duty applications such as structural steel connections, industrial machinery assembly, and transportation equipment manufacturing.

Specification Summary & Compliance

This 3/4"-10 UNC hex head screw features Class 2A thread fit tolerances for consistent engagement and proper clearances. Manufactured in compliance with IFI 111/SAE J429 specifications for Grade 8 fasteners, ensuring dimensional accuracy and mechanical properties. The product meets industry standards for heavy-duty applications and conforms to RoHS and REACH environmental regulations for hazardous substance restrictions.