S-91273A629 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and reducing replacement frequency.
• Enhanced durability and wear resistance from the black oxide finish, providing added protection against abrasion and extending service life.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under heavy loads and mechanical stress.
• Precise thread engagement and easy assembly with UNC coarse threads and Class 2A fit, minimizing cross-threading and speeding up installation.
• Secure, non-slip fastening thanks to the knurled head and hex socket drive, allowing for high torque application without tool slippage.
• Accurate alignment and spacing provided by the 3/4" shoulder length and consistent shoulder diameter, essential for pivot points and rotating assemblies.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries and global market acceptance.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery. The 18-8 stainless steel material offers excellent resistance to rust and oxidation, making it suitable for applications in humid or corrosive settings, such as food processing equipment or outdoor machinery. The black oxide finish not only enhances corrosion protection but also reduces galling during installation. With a 3/8"-16 UNC coarse thread and Class 2A fit, it ensures quick, secure fastening in metal assemblies, reducing assembly time and improving reliability. The knurled head and hex socket drive allow for efficient torque transfer, preventing stripping in high-vibration environments like automotive or aerospace components. Its 3/4" shoulder length provides precise bearing surfaces for rotating parts, minimizing wear and maintenance in pivoting mechanisms.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 2A tolerance for precise fit, and a shoulder diameter of 3/8" with tight tolerances (-0.004" to -0.002") for accurate alignment. It adheres to industry standards for thread spacing (coarse) and right-hand thread direction, and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.