S-92245A592 5/16"-18 x 2 1/4" FF-S-85, MS35307-341 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
- Exceptional corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Superior mechanical strength with 70,000 psi tensile strength and Rockwell B74 hardness for reliable, heavy-duty fastening
- Precise thread engagement with Class 2A thread fit ensuring consistent performance and reduced assembly issues
- Optimized for quick installation featuring coarse UNC threading and external hex drive for efficient tool engagement
- Enhanced durability in partial threading design provides controlled clamping force and vibration resistance
- Full regulatory compliance meeting Fed. Spec. FF-S-85 (MS35307-341), RoHS 3, and REACH for safe, global usage
- Versatile 2 1/4" length with 7/8" minimum thread length accommodating various material thicknesses
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head screw delivers critical performance in demanding applications where corrosion resistance and structural integrity are paramount. Manufactured from passivated 18-8 stainless steel, it effectively combats chemical exposure and moisture, extending service life in industrial machinery, marine hardware, and outdoor infrastructure. The coarse UNC thread and partial threading design prevent loosening under vibration while enabling rapid installation in assembly lines. With its external hex drive and precise Class 2A thread fit, engineers achieve consistent torque transmission and reduced cross-threading risks, ensuring reliable connections in structural frameworks, heavy equipment, and transportation systems where 70,000 psi tensile strength is essential for load-bearing safety.
Specification Summary & Compliance
This fastener maintains Class 2A thread fit tolerance with 5/16"-18 UNC coarse threads and right-hand direction. Manufacturing adheres to Fed. Spec. FF-S-85 (MS35307-341) for dimensional consistency. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for industrial distribution.
