S-92245A554 1/4"-20 x 2 3/4" FF-S-85, MS35307-317 Mil. Spec. 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• Optimized torque transmission through the external hex drive and 7/16" head width for secure installation
• Enhanced durability with Rockwell B74 hardness, providing excellent wear resistance and longevity
• Reliable coarse UNC threading (1/4"-20) facilitates quick assembly and reduces cross-threading risks
• Versatile partial threading design allows for precise clamping force distribution in various applications
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring environmental and safety adherence

Professional Applications & Engineering Value

This 1/4-20 UNC hex head screw delivers critical engineering solutions where corrosion resistance and high tensile strength are paramount. The passivated 18-8 stainless steel construction effectively combats oxidation and chemical exposure in demanding environments like marine equipment, food processing machinery, and outdoor structures. Its coarse UNC thread profile ensures rapid installation and superior holding power in soft materials or where vibration resistance is crucial. The partial threading design provides optimal unthreaded shank strength while maintaining precise clamp load distribution. Meeting Fed. Spec. FF-S-85 (MS35307-317), this fastener delivers consistent performance for military, aerospace, and industrial applications requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

This 2-3/4" length hex head screw features precise Class 2A thread fit tolerance for consistent engagement and coarse UNC 1/4"-20 threading with minimum 3/4" thread length. Manufactured to Fed. Spec. FF-S-85 (MS35307-317) standards, it ensures dimensional accuracy and performance reliability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and chemical safety requirements for industrial applications worldwide.