S-90201A115 1/4"-20 x 1 1/4" Extreme-Strength Grade 9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 180,000 PSI tensile strength, ideal for high-stress industrial assemblies.
• Superior corrosion resistance provided by Zinc Yellow-Chromate plating, extending service life in harsh environments.
• Reliable torque transmission through the external hex drive and hex head design, ensuring secure installation with standard tools.
• Optimized thread engagement with Class 2A fit and coarse UNC threading, reducing cross-threading risks and speeding up assembly.
• Enhanced durability from Rockwell C38 hardness, maintaining structural integrity under repetitive loads and vibrations.
• Versatile partial threading allowing for precise clamping force control in varied material thicknesses.
• Compliance with strict environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable usage.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this Grade 9 hex head screw combines high-strength steel material and a robust 1/4"-20 UNC coarse thread to address common challenges like joint failure and corrosion in machinery, construction, and automotive sectors. The zinc yellow-chromate finish significantly enhances corrosion resistance, making it suitable for outdoor or humid conditions. With partial threading and Class 2A thread fit, it ensures precise fastening without compromising on ease of installation, reducing downtime and maintenance costs in heavy-duty fastening scenarios.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit and UNC coarse thread standards, with dimensions including a 1/4"-20 thread size and 1 1/4" length. It meets Grade 9 strength classification and is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and performance reliability.