S-92245A564 1/4"-28 x 7/8" FF-S-85, MS35308-307 Mil. Spec. 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Corrosion-resistant performance with passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and resistance to mechanical failure in demanding applications
• Precision Class 2A thread fit guarantees consistent engagement and reduces the risk of cross-threading during installation
• Fine UNF thread design provides superior vibration resistance and improved clamping force compared to coarse threads
• External hex drive with 7/16" head width allows for high-torque installation using standard tools, speeding up assembly processes
• Full threading along the 7/8" length offers maximum adjustability and secure fastening across varied material thicknesses
• Compliance with Fed. Spec. FF-S-85 (MS35308-307) ensures adherence to stringent federal standards for quality and reliability

Professional Applications & Engineering Value

Engineered for industrial fastening where durability and precision are non-negotiable, this 1/4"-28 UNF hex head screw addresses common challenges like corrosion-induced degradation and vibration loosening. The passivated 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for outdoor equipment, marine hardware, and machinery exposed to moisture. Its fine thread spacing enhances grip in metals and plastics, reducing the need for frequent retightening in high-vibration environments such as automotive assemblies or aerospace components. With a Rockwell B74 hardness and fully threaded design, it delivers consistent performance in structural applications, ensuring long-term integrity and reducing maintenance costs for B2B clients.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF thread with Class 2A fit for precise dimensional accuracy, adhering to standard inch measurements. It meets Fed. Spec. FF-S-85 (MS35308-307) for quality assurance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.