S-92245A751 1/2"-20 x 1" FF-S-85, MS35308-409 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 for long-lasting performance in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B74 hardness for heavy-duty applications
• Precision thread engagement with Class 2A UNF fine threads ensuring reliable, vibration-resistant connections
• Maximum fastening security through fully threaded design that distributes clamping force evenly across the entire length
• Easy installation and removal with standard 3/4" external hex head design for common tool compatibility
• Regulatory compliance assurance meeting Fed. Spec. FF-S-85, RoHS 3, and REACH standards for quality and safety
• Optimized for industrial use with right-hand thread direction and fine thread spacing for precise tension control

Professional Applications & Engineering Value

This 1/2"-20 UNF hex head screw delivers critical engineering advantages in demanding industrial environments where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making it ideal for marine, chemical processing, and outdoor applications. The fine thread spacing and Class 2A thread fit ensure precise engagement with mating components, reducing the risk of vibration-induced loosening in machinery, heavy equipment, and structural assemblies. With its fully threaded design and external hex drive, this fastener offers superior clamping force distribution and straightforward installation using standard tools, streamlining maintenance and assembly processes while maintaining consistent performance under high-stress conditions.

Specification Summary & Compliance

This precision fastener features 1/2"-20 UNF threads with Class 2A thread fit tolerance for optimal engagement, manufactured to exacting standards including Fed. Spec. FF-S-85 (MS35308-409). The screw maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. With a 1" length, 5/16" head height, and 3/4" head width, this fully threaded hex head screw delivers consistent dimensional accuracy for reliable performance across industrial applications.