S-90166A128 3/8"-16 x 1 1/4" ASTM F593, IFI 111 Stainless Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• Flanged design eliminates need for separate washers, speeding up assembly and providing wider bearing surface
• Class 2A thread fit with UNC coarse threading allows for easier assembly and better debris resistance
• External hex drive with 9/16" head width provides secure tool engagement for high-torque applications
• Full threading along 1-1/4" length maximizes grip strength and load distribution
• Rockwell B80 hardness maintains thread integrity and prevents stripping during repeated use

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw delivers exceptional engineering value through its 18-8 stainless steel composition and flanged design. The material's inherent corrosion resistance makes it perfect for outdoor equipment, marine applications, and chemical processing facilities where moisture and corrosive elements are concerns. The coarse UNC threading provides superior performance in soft materials and applications prone to vibration loosening, while the integrated flange distributes clamping force effectively, preventing surface damage and reducing installation time. These fully threaded flange screws are engineered to maintain integrity in high-stress assemblies, from heavy machinery to structural frameworks, ensuring long-term reliability without compromising on compliance standards.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit with 3/8"-16 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASTM F593 specifications (IFI 111) for consistent quality and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety. Critical dimensions include 1-1/4" length, 13/16" flange diameter, and 0.375" thread diameter, ensuring interchangeability and reliable fastening in industrial applications.