S-90400A226 1/4"-20 x 3/4" ASME B18.13 Steel Pan Head Phillips Screws with Spring Lock Washer

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments.
• Enhanced vibration resistance thanks to the integrated spring lock washer, preventing loosening under dynamic loads.
• High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for reliable, heavy-duty fastening.
• Efficient installation using the Phillips No. 3 drive, providing a secure grip and reducing tool slippage.
• Optimized thread engagement with UNC coarse threads and Class 2A fit, ensuring quick assembly and strong holding power.
• Versatile fully threaded design for consistent clamping force along the entire 3/4" length in various material thicknesses.
• Compliance with industry standards including ASME B18.13, ensuring consistent quality and interchangeability.

Professional Applications & Engineering Value

This zinc-plated steel screw with a Phillips pan head and integrated spring lock washer is engineered to address critical challenges in industrial assembly, such as vibration-induced loosening and corrosion. The UNC coarse thread and Class 2A thread fit provide excellent grip in a wide range of materials, from metal to plastic, reducing the risk of strip-out during high-torque applications. Its fully threaded design ensures uniform stress distribution, making it ideal for machinery, automotive components, and electrical enclosures where reliability is paramount. The combination of a 60,000 psi tensile strength and Rockwell B70 hardness guarantees durability under heavy loads, while the zinc plating offers a protective barrier against moisture and chemicals, extending the lifespan of your equipment in demanding environments.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with a Class 2A thread fit for precise dimensional accuracy and easy assembly. It is manufactured in compliance with ASME B18.13 specifications, ensuring consistent performance and interchangeability. Additionally, the product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming its environmental safety and suitability for global industrial use.