S-90152A113 4-40 x 3/8" ASME B18.3, ASTM F837 Stainless Steel Wire-Lockable Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• High tensile strength of 80,000 psi ensures dependable performance under significant mechanical stress and vibration.
• Precise Class 3A thread fit provides excellent engagement and reduces the risk of cross-threading during assembly.
• Hex socket drive design allows for high torque application and secure installation in confined spaces.
• Compliance with ASME B18.3 standards guarantees dimensional accuracy and interchangeability for professional use.
• RoHS 3 compliance ensures the screw meets environmental regulations for use in various industries.
• Coarse UNC thread facilitates quicker assembly and better performance in materials where fine threads may strip.

Professional Applications & Engineering Value

This 4-40 UNC thread socket head cap screw is engineered to address critical challenges in industrial and engineering applications. Manufactured from 18-8 stainless steel, it offers excellent corrosion resistance, making it suitable for use in moist or chemically aggressive environments without compromising integrity. The Class 3A thread fit and coarse thread design ensure reliable fastening in materials prone to stripping, while the hex drive and standard socket head profile enable efficient installation with standard tools, reducing assembly time. Commonly used in machinery, electronics, and automotive sectors, this screw provides a robust solution for applications demanding high strength, precision, and durability, helping to minimize maintenance and downtime.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with a Class 3A fit for precise tolerances, and is fully threaded for consistent holding power. It meets ASME B18.3 specifications (referencing ASTM F837) for dimensional accuracy and is RoHS 3 (2015/863/EU) compliant, ensuring adherence to environmental and safety standards. With a length of 3/8 inch and manufactured in the inch system, it is designed for reliable performance in various industrial fastening tasks.