S-92245A569 1/4"-28 x 1 1/4" FF-S-85, MS35308-310 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 in demanding applications
- Rockwell B74 hardness provides excellent durability and resistance to wear
- Class 2A thread fit with UNF fine threads delivers precise, secure fastening and vibration resistance
- External hex drive design allows for easy installation and removal with standard tools
- Partial threading offers optimal grip and clamping force for specific assembly needs
- Compliance with RoHS 3 and REACH ensures environmental and safety standards are met
Professional Applications & Engineering Value
This 1/4"-28 UNF hex head screw is engineered to address critical challenges in industrial assemblies where corrosion resistance and mechanical strength are paramount. The passivated 18-8 stainless steel material provides long-term reliability in moist or chemically aggressive settings, reducing maintenance costs and downtime. With its fine thread spacing and Class 2A thread fit, it ensures tight, secure connections that resist loosening under vibration, making it ideal for machinery, automotive, and structural applications. The external hex drive facilitates quick installation, while the partially threaded design allows for controlled clamping in precision equipment. Meeting Fed. Spec. FF-S-85 (MS35308-310), this fastener delivers consistent performance for B2B procurement in sectors requiring dependable, heavy-duty stainless steel fasteners.
Specification Summary & Compliance
This hex head screw features a 1/4"-28 UNF thread size with Class 2A thread fit and fine thread spacing, ensuring dimensional accuracy and reliable fastening. It complies with Fed. Spec. FF-S-85 (MS35308-310) for manufacturing standards, and is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, affirming its adherence to environmental and safety regulations for industrial use.
