S-92245A949 5/16"-24 x 2 3/4" FF-S-85, MS35308-343 Mil. Spec. 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Superior mechanical strength with 70,000 psi tensile strength and Rockwell B74 hardness for reliable load-bearing performance
• Precise thread engagement through Class 2A thread fit and UNF fine threading, ensuring secure fastening in critical applications
• Optimized partial threading design provides controlled clamping force while reducing material usage
• Easy installation and removal with standard external hex drive and 1/2" head width for common tool compatibility
• Long-term reliability with compliance to Fed. Spec. FF-S-85 (MS35308-343) for consistent quality and performance
• Environmental compliance meeting RoHS 3 and REACH regulations for safe use across global markets

Professional Applications & Engineering Value

These 5/16"-24 UNF hex head screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against rust and chemical degradation, making these external hex drive fasteners ideal for machinery, structural assemblies, and equipment exposed to moisture or corrosive agents. The fine thread spacing and Class 2A thread fit ensure precise engagement in tapped holes, reducing the risk of cross-threading while maintaining vibration resistance. With partial threading optimizing the grip length, these screws provide superior clamping force control in applications requiring specific unthreaded shank sections, from heavy-duty equipment to precision assemblies requiring repeated disassembly and maintenance.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit tolerance and UNF fine thread specifications (5/16"-24). Complies with Fed. Spec. FF-S-85 where identified as MS35308-343, ensuring consistent dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for environmental safety and regulatory acceptance in industrial markets worldwide.