S-92245A580 5/16"-18 x 5/8" FF-S-85, MS35307-331 Mil. Spec. 18-8 Stainless Steel Hex Head Screws
Mil. Spec. 18-8 Stainless Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance from passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional tensile strength of 70,000 PSI ensures reliable, heavy-duty fastening performance under high stress
- Precise Class 2A thread fit provides smooth installation and secure engagement with mating components
- External hex drive design enables high-torque application with standard tools for efficient assembly
- Full threading along 5/8" length maximizes grip strength and load distribution across the entire fastener
- Coarse UNC thread pattern facilitates quick installation and reduces cross-threading risks
- Rockwell B74 hardness rating delivers excellent durability and resistance to wear in demanding applications
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head screw delivers critical engineering advantages where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against rust and chemical degradation in marine, chemical processing, and outdoor industrial applications. The coarse UNC thread design ensures rapid assembly in production environments while maintaining secure fastening in high-vibration settings. With fully threaded construction and external hex drive, this fastener offers maximum clamping force distribution and compatibility with standard industrial tools, reducing installation time and improving maintenance efficiency across machinery, structural frameworks, and equipment manufacturing.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading (5/16"-18). Complies with Fed. Spec. FF-S-85 (MS35307-331) manufacturing standards. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features 0.3125" thread diameter and 5/8" length with right-hand thread orientation.
