S-92245A726 1/2"-13 x 2 1/2" FF-S-85, MS35307-417 Mil. Spec. 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 70,000 PSI ensures reliable load-bearing capacity and structural integrity
• Class 2A thread fit provides consistent assembly with standard nuts and threaded components
• External hex drive and 3/4" head width enable secure, high-torque installation with common tools
• Partially threaded design offers optimal clamping force control for precise joint applications
• Rockwell B74 hardness rating delivers excellent wear resistance and long-term durability
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw delivers critical performance in demanding applications where corrosion resistance and mechanical strength are paramount. The passivated 18-8 stainless steel material provides exceptional protection against oxidation and chemical exposure, making it suitable for marine, chemical processing, and outdoor infrastructure. The coarse UNC thread and Class 2A thread fit ensure rapid assembly and reliable engagement in structural steel, heavy machinery, and transportation equipment. With its external hex drive and partially threaded configuration, it enables precise tension control in bolted connections, reducing the risk of joint failure under dynamic loads. This fastener meets Fed. Spec. FF-S-85 (MS35307-417), guaranteeing consistent quality for military, aerospace, and industrial OEM specifications.

Specification Summary & Compliance

This inch-system fastener features a 1/2"-13 UNC coarse thread with Class 2A thread fit tolerance, ensuring compatibility with standard industrial components. The screw has a 2 1/2" length with 1 1/4" minimum thread length and 3/4" head width for optimal installation clearance. Manufacturing and material properties comply with Fed. Spec. FF-S-85 (MS35307-417), while environmental regulations adherence includes full RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for global market acceptance.