S-92245A582 5/16"-18 x 7/8" FF-S-85, MS35307-333 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.
- High tensile strength of 70,000 PSI ensures reliable performance under heavy loads and prevents mechanical failure.
- External hex drive and hex head design allows for easy installation and high torque application with common tools.
- Fully threaded 7/8" length provides maximum grip and holding power across the entire fastener engagement.
- Coarse UNC thread with Class 2A fit offers quick assembly and reliable performance in a wide range of materials.
- Consistent Rockwell B74 hardness maintains structural integrity and resistance to wear and deformation.
- Compliance with Fed. Spec. FF-S-85 (MS35307-333), RoHS 3, and REACH guarantees material quality and environmental safety for regulated industries.
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head screw is engineered for demanding industrial applications where corrosion resistance and high tensile strength are critical. Manufactured from Passivated 18-8 Stainless Steel, it effectively combats rust and chemical exposure in marine, chemical processing, and outdoor equipment. The coarse thread and Class 2A thread fit ensure rapid, secure fastening in metals, plastics, and composites, reducing assembly time while maintaining joint integrity. The external hex drive facilitates high-torque installation, making it suitable for machinery, structural frames, and heavy-duty assemblies where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC coarse thread with Class 2A thread fit for standard dimensional accuracy and ease of assembly. It meets Fed. Spec. FF-S-85 (identified as MS35307-333) for material and manufacturing consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial and international markets.
