S-92245A934 1/4"-28 x 9/16" FF-S-85, MS35308-304 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
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B74 hardness for reliable, long-term performance
- Precise thread engagement through Class 2A thread fit and UNF fine threading, ensuring secure fastening and vibration resistance
- Efficient installation and removal with external hex drive and standard hex head design, compatible with common tools
- Full threading for maximum grip across the entire 9/16" length, providing uniform clamping force
- Compliance with major industry standards including Fed. Spec. FF-S-85 (MS35308-304), RoHS 3, and REACH, ensuring safety and regulatory adherence
- Right-hand thread direction for standard application use, simplifying assembly processes
Professional Applications & Engineering Value
This 1/4"-28 UNF hex head screw delivers critical performance in demanding settings where fastener failure is not an option. The passivated 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, extending service life in machinery, marine equipment, and outdoor structures. Its fine thread and Class 2A fit offer superior holding power in high-vibration applications, preventing loosening under dynamic loads. The external hex drive allows for high-torque installation, making it suitable for assembly lines and maintenance operations requiring quick, secure fastening. Engineered to meet rigorous Fed. Spec. FF-S-85 and global environmental regulations, this screw ensures reliability and compliance across aerospace, automotive, and industrial manufacturing sectors.
Specification Summary & Compliance
This screw features a 1/4"-28 UNF fine thread with Class 2A thread fit for precise dimensional accuracy. It is manufactured in compliance with Fed. Spec. FF-S-85 (MS35308-304) and adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming its suitability for regulated and environmentally conscious applications.
