S-94288A318 3/8"-16 x 1 1/2" Extreme-Strength Stainless Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 450 Stainless Steel construction, ideal for harsh industrial environments
• Superior load distribution thanks to the integrated flange design, reducing surface pressure and preventing loosening
• High tensile strength of 170,000 psi ensures reliable performance in demanding, heavy-duty applications
• Robust Rockwell C38 hardness provides excellent wear resistance and long-term durability
• Easy installation and removal with the standard external hex drive and coarse UNC threads
• Precise Class 2A thread fit guarantees consistent, secure fastening and interchangeability
• Versatile partial threading allows for optimal clamp force control in a wide range of material thicknesses

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 3/8"-16 UNC hex head screw in 450 Stainless Steel addresses critical challenges in machinery assembly, structural framing, and equipment manufacturing. The flanged design eliminates the need for a separate washer, providing a larger bearing surface that distributes clamp load more effectively, preventing surface damage and maintaining joint integrity under vibration. The coarse thread and partial threading enable faster installation and superior grip in softer materials or where precise clamp load is required. With its high tensile strength and inherent corrosion resistance, this fastener is a reliable solution for applications demanding both mechanical performance and longevity in corrosive environments, reducing maintenance frequency and total cost of ownership.

Specification Summary & Compliance

This hex head screw features a 3/8"-16 UNC coarse thread with a Class 2A thread fit per ASME/ANSI standards, ensuring dimensional accuracy and interchangeability. The 1-1/2" length and partial threading (min. 1-1/8") are manufactured to precise specifications. The 450 Stainless Steel material and manufacturing process comply with industry standards for mechanical properties, including the specified 170,000 psi tensile strength and Rockwell C38 hardness. It is RoHS and REACH compliant, making it suitable for use in regulated industries.