S-92245A921 1/2"-13 x 1 1/8" FF-S-85, MS35307-410 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 and outdoor applications.
• Superior tensile strength of 70,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Class 2A thread fit provides consistent, smooth assembly and disassembly, minimizing cross-threading and improving installation efficiency.
• Fully threaded design offers maximum grip and holding power along the entire 1-1/8" length for secure fastening in various material thicknesses.
• External hex drive and 3/4" head width enable easy installation with standard tools, reducing assembly time and labor costs.
• Coarse UNC threading ensures quick engagement and strong holding in a wide range of materials, from metal to composite substrates.
• Compliance with RoHS 3 and REACH standards guarantees environmental safety and regulatory acceptance for global industrial supply chains.

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw delivers critical performance in demanding applications where corrosion resistance and high tensile strength are paramount. The passivated 18-8 stainless steel material effectively combats rust and chemical exposure, making it ideal for marine, chemical processing, and outdoor structural assemblies. Its coarse thread and Class 2A fit provide rapid, reliable fastening in both soft and hard materials, reducing installation errors and maintenance downtime. The fully threaded design ensures uniform load distribution, preventing joint loosening under vibration—common in machinery, transportation equipment, and heavy-duty construction. Engineered to meet Fed. Spec. FF-S-85 (MS35307-410), this screw offers consistent quality for OEMs and MRO professionals seeking durable, compliant fastening solutions.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for standard industrial tolerances, ensuring precise and repeatable assembly. It is manufactured in compliance with Fed. Spec. FF-S-85 (identified as MS35307-410), guaranteeing adherence to strict dimensional and performance criteria. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting essential environmental and safety regulations for use in global markets.