S-90409A200 3/4"-10 x 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 in the most demanding heavy-duty applications, reducing the risk of fastener failure.
• Grade 8 steel construction with Rockwell C32 hardness provides superior durability and resistance to wear, extending the service life of your assemblies.
• Integrated flange distributes clamping force over a wider area, eliminating the need for a separate washer and speeding up installation.
• Coarse UNC thread and Class 2A thread fit enable quick and easy assembly, even in materials where fine threads might be prone to stripping.
• Fully threaded design offers maximum grip and adjustability along the entire 2-inch length for versatile and secure fastening.
• External hex drive allows for high-torque installation with common tools, ensuring a tight and secure fit in industrial settings.
• Compliance with IFI 111/SAE J429 specifications guarantees consistent quality and interchangeability, critical for professional procurement and engineering standards.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to solve critical challenges in heavy machinery, construction, and structural applications where vibration and high loads are constant concerns. The steel material, hardened to Rockwell C32, resists deformation under stress, while the coarse UNC thread provides superior holding power in softer materials or where rapid assembly is required. The flanged design acts as an integrated washer, increasing bearing surface to prevent surface damage and loosening. This combination of high tensile strength (150,000 PSI) and robust construction makes it an ideal choice for securing critical components in automotive, agricultural, and industrial equipment, ensuring long-term reliability and safety.

Specification Summary & Compliance

This fastener features a 3/4"-10 UNC coarse thread with a Class 2A thread fit for standard tolerance and easy assembly. It is manufactured to meet the stringent requirements of IFI 111 SAE J429, ensuring consistent dimensional accuracy and mechanical properties. The screw is fully threaded with a length of 2 inches, a head width of 1 1/8", and a flange diameter of 1 19/32".