S-92245A811 5/8"-11 x 2 1/2" FF-S-85, MS35307-466 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 industrial environments
- High tensile strength of 70,000 PSI ensures reliable performance under heavy loads and stress
- Rockwell B74 hardness provides excellent durability and resistance to wear and deformation
- External hex drive design allows for easy installation and removal with standard tools
- Class 2A thread fit offers consistent, precise engagement for secure fastening
- Coarse UNC threading enables quick assembly and reduced cross-threading risks
- Partial threading provides unthreaded shank for enhanced shear strength and alignment
Professional Applications & Engineering Value
This 5/8"-11 UNC hex head screw delivers exceptional engineering value in demanding applications where corrosion resistance and structural integrity are critical. Manufactured from passivated 18-8 stainless steel, it effectively combats rust and chemical degradation in marine, chemical processing, and outdoor industrial settings. The coarse thread design ensures rapid installation in various materials while minimizing stripping, while the partial threading configuration provides superior clamping force distribution. With its external hex drive and substantial head dimensions, it offers excellent torque transmission for high-strength connections in structural steelwork, heavy machinery, and infrastructure projects where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
This hex head screw features 5/8"-11 UNC coarse threads with Class 2A thread fit for consistent dimensional accuracy. The fastener meets Fed. Spec. FF-S-85 (MS35307-466) manufacturing standards and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. With a length of 2 1/2" and minimum thread length of 1 1/2", it maintains precise threading specifications while the Rockwell B74 hardness and 70,000 PSI tensile strength ensure mechanical performance meets industrial requirements.
