S-92245A959 1/2"-20 x 1 1/8" FF-S-85, MS35308-410 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 performance under heavy loads and vibration
• Precise Class 2A thread fit for smooth assembly and consistent clamping force in critical applications
• External hex drive design allows for high-torque installation with standard tools, reducing assembly time
• Full threading along the 1-1/8" length provides maximum grip and load distribution across the entire fastener
• Compliance with Fed. Spec. FF-S-85 (MS35308-410) guarantees consistent quality and interchangeability
• Rockwell B74 hardness rating maintains thread integrity and prevents stripping during repeated use

Professional Applications & Engineering Value

This 1/2"-20 UNF hex head screw delivers exceptional engineering value in demanding applications where corrosion resistance and mechanical strength are critical. The passivated 18-8 stainless steel material provides excellent protection against oxidation and chemical exposure, making it suitable for marine, chemical processing, and outdoor equipment. The fine UNF thread spacing and Class 2A thread fit ensure vibration-resistant connections in machinery, structural assemblies, and precision equipment. With its external hex drive and fully threaded design, it enables quick installation and uniform stress distribution, solving common issues of fastener loosening and joint failure in high-stress industrial environments.

Specification Summary & Compliance

Manufactured to precise Class 2A thread tolerances with UNF thread form and right-hand threading. Complies with Fed. Spec. FF-S-85 (MS35308-410) manufacturing standards. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements.