S-92245A948 5/16"-24 x 2 1/2" FF-S-85, MS35308-342 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 rated at 70,000 PSI for reliable load-bearing performance in demanding applications
• Precise Class 2A thread fit ensures smooth assembly and consistent clamping force in UNF fine-threaded connections
• Optimized partial threading provides enhanced grip where needed while reducing material usage and weight
• External hex drive design allows for high-torque installation with standard tools and easy visual inspection
• Comprehensive compliance with Fed. Spec. FF-S-85 (MS35308-342), RoHS 3, and REACH for regulated industries
• Rockwell B74 hardness maintains thread integrity and prevents stripping during repeated installations

Professional Applications & Engineering Value

This 5/16"-24 UNF hex head screw delivers critical performance advantages in industrial fastening systems where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction 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, while the partially threaded design concentrates clamping force precisely where needed. With its external hex drive and substantial 2-1/2" length, this fastener enables efficient installation in deep-clearance applications while maintaining the structural integrity required for high-stress assemblies.

Specification Summary & Compliance

This hex head screw features 5/16"-24 UNF fine threads with Class 2A thread fit tolerance for precision assembly. Manufacturing complies with Fed. Spec. FF-S-85 (MS35308-342) specifications, ensuring consistent quality and dimensional accuracy. The fastener is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental regulations for industrial components. Mechanical properties include 70,000 PSI tensile strength and Rockwell B74 hardness for durable performance in demanding applications.