S-92245A961 1/2"-20 x 2" FF-S-85, MS35308-415 Mil. Spec. 18-8 Stainless Steel Hex Head Screws
Mil. Spec. 18-8 Stainless Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life.
- Exceptional tensile strength rated at 70,000 psi, providing reliable performance in high-stress and heavy-duty applications.
- Precise Class 2A thread fit ensures smooth assembly and secure fastening with consistent engagement.
- Fine UNF thread spacing offers improved vibration resistance and superior clamping force compared to coarse threads.
- Durable Rockwell B74 hardness maintains structural integrity and resists wear during installation and use.
- Partially threaded design allows for unthreaded shank sections to bear shear loads effectively.
- External hex head enables high-torque installation with standard tools for efficient assembly and maintenance.
Professional Applications & Engineering Value
This 1/2"-20 UNF hex head screw delivers critical engineering value through its passivated 18-8 stainless steel composition and fine thread configuration. The material's inherent corrosion resistance prevents degradation in moisture-rich or chemically aggressive industrial settings, eliminating premature fastener failure. The 70,000 psi tensile strength and Rockwell B74 hardness ensure the screw withstands substantial mechanical loads without stripping or shearing, making it suitable for structural assemblies, machinery frames, and heavy equipment. The Class 2A thread fit guarantees dimensional accuracy for consistent mating with nuts and tapped holes, reducing installation time and improving joint reliability. These characteristics make it an optimal choice for aerospace, marine, and manufacturing applications where corrosion-resistant screws with precise threading are mandatory for safety and longevity.
Specification Summary & Compliance
This hex head screw features a 1/2"-20 UNF fine thread with Class 2A thread fit for precise dimensional tolerance. It is manufactured in compliance with Fed. Spec. FF-S-85 (MS35308-415) and adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
