S-92245A568 1/4"-28 x 1 1/8" FF-S-85, MS35308-309 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 from 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 vibration
- Class 2A thread fit with UNF fine threading provides precise, secure fastening in critical applications
- External hex drive design allows for easy installation and removal with standard tools
- Partially threaded shank offers optimal grip length while reducing material usage and weight
- Compliance with Fed. Spec. FF-S-85 (MS35308-309) guarantees consistent quality and interchangeability
- RoHS 3 and REACH compliance ensures environmental safety and regulatory acceptance in global markets
Professional Applications & Engineering Value
This 1/4"-28 UNF hex head screw delivers exceptional engineering value in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel material provides excellent protection against oxidation and chemical exposure, making it suitable for marine, chemical processing, and outdoor equipment applications. The fine thread spacing and Class 2A thread fit ensure vibration-resistant connections in machinery, automotive assemblies, and structural frameworks. With its partially threaded design, it prevents over-tightening while maintaining clamp load integrity. The external hex drive facilitates quick maintenance and disassembly, reducing downtime in production environments where frequent adjustments are necessary.
Specification Summary & Compliance
This hex head screw features precision Class 2A thread fit with 1/4"-28 UNF fine threads and right-hand direction. Manufacturing complies with Fed. Spec. FF-S-85 (MS35308-309) for dimensional consistency. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in international industrial markets.
