S-91273A506 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and extended service life.
• Enhanced grip and tool engagement from the knurled hex socket head, reducing slippage during installation.
• High strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness, ensuring reliable performance under load.
• Precise alignment and pivot function due to the 3/8" shoulder length with tight tolerances, minimizing part movement.
• Easy assembly and disassembly with the coarse 1/4"-20 UNC thread and Class 2A fit, speeding up maintenance.
• Compliance with environmental regulations including RoHS 3 and REACH, making it safe for various industrial applications.
• Versatile drive compatibility using a standard 1/8" hex drive, facilitating quick installation with common tools.

Professional Applications & Engineering Value

This 18-8 Stainless Steel shoulder screw is engineered to address common challenges in mechanical assemblies, such as misalignment and wear. The 3/8" shoulder length provides a precise bearing surface for rotating parts like gears and pulleys, reducing friction and extending component life. Its coarse UNC thread and Class 2A fit ensure quick, secure fastening in high-vibration environments, while the knurled hex socket head offers superior torque transmission without stripping. Ideal for applications in machinery, automotive, and electronics, this fastener delivers reliable corrosion resistance and strength, meeting the demands of industrial shoulder bolt uses where durability and precision are critical.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 2A fit for standard tolerance, a shoulder diameter of 1/4" with tight tolerances, and a shoulder length of 3/8". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for various industrial applications.