S-92245A539 1/4"-20 x 5/8" FF-S-85, MS35307-305 Mil. Spec. 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B74 hardness for heavy-duty load-bearing applications.
• Quick and secure installation with external hex drive and coarse UNC threading, reducing assembly time and improving grip.
• Precise thread fit with Class 2A tolerance, guaranteeing consistent engagement and vibration resistance.
• Full threading along the 5/8" length maximizes holding power and allows for adjustable fastening depth.
• Compliance with strict industry standards including Fed. Spec. FF-S-85 (MS35307-305), ensuring interchangeability and quality.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 1/4"-20 hex head screws provide reliable fastening in machinery, structural assemblies, and outdoor equipment where corrosion resistance is critical. The passivated 18-8 stainless steel material combats rust and chemical exposure, while the coarse UNC thread spacing and Class 2A thread fit ensure rapid installation and secure hold under vibration. With fully threaded design and 70,000 psi tensile strength, they deliver consistent performance in high-stress applications, reducing maintenance needs and downtime.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC thread with Class 2A fit for precise dimensional accuracy. It meets Fed. Spec. FF-S-85 (MS35307-305) and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safety and environmental standards are upheld.