S-91273A639 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• Precise component alignment ensured by the 3" shoulder length with tight tolerances, reducing assembly errors.
• High tensile strength of 70,000 psi and Rockwell B55 hardness for reliable performance under heavy loads.
• Secure, non-slip installation with a knurled head and hex socket drive, allowing for high torque application.
• Consistent thread engagement provided by UNC coarse threads and Class 2A fit, facilitating quick assembly.
• Compliance with RoHS 3 and REACH regulations, ensuring environmental safety and suitability for global markets.
• Versatile industrial use in machinery, automotive, and precision equipment due to robust material and design.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address common industrial challenges such as misalignment and wear in rotating assemblies. Made from 18-8 stainless steel with a black oxide finish, it offers superior corrosion resistance, extending service life in moist or chemically aggressive settings. The 3" shoulder length with precise tolerances ensures accurate positioning of components like gears and pulleys, minimizing vibration and reducing maintenance needs. The hex socket drive and knurled head provide a firm grip for easy installation in confined spaces, while the coarse threads and Class 2A fit enable rapid, reliable fastening. Ideal for applications in automotive systems, industrial machinery, and precision instruments, this shoulder screw delivers durability and efficiency, supporting seamless operations in demanding B2B environments.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 2A fit for standard tolerance and easy assembly. The shoulder diameter and length adhere to precise tolerances (e.g., shoulder diameter: -0.004" to -0.002", shoulder length: -0.005" to 0.005"), ensuring dimensional accuracy. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for industrial use. Manufactured to high standards, it meets typical industry requirements for strength and safety without specific ASME callouts, providing reliable performance in various applications.