S-97345A194 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
• High mechanical strength and reliability with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
• Precise assembly and secure fit ensured by the Class 3A thread fit and standard shoulder fit, reducing the risk of loosening.
• Easy installation and removal with the 5/64" hex drive and knurled head, providing excellent grip and torque transmission.
• Durable and wear-resistant material with Rockwell B79 hardness, maintaining performance under repeated use.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global markets.
• Versatile coarse UNC threading (4-40) for faster assembly and reduced cross-threading in various components.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automotive assemblies, and electronic enclosures where corrosion resistance and high tensile strength are paramount. The 4-40 UNC coarse thread and Class 3A fit ensure secure fastening with minimal play, reducing vibration-induced failures. The knurled head and 5/64" hex drive facilitate quick installation in tight spaces, while the standard shoulder provides accurate alignment for rotating parts like bearings and pulleys. Its compliance with RoHS and REACH makes it a reliable choice for industries requiring adherence to strict environmental and safety standards, enhancing operational reliability and reducing maintenance costs.

Specification Summary & Compliance

This shoulder screw features a 4-40 UNC coarse thread with Class 3A fit for precise thread engagement. Dimensions include a head diameter of 0.25", shoulder diameter of 1/8" with tolerance from -0.004" to -0.002", and shoulder length of 15/16" with tolerance from -0.005" to 0.005". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for industrial applications demanding high performance and regulatory adherence.