S-91273A575 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Enhanced durability and wear resistance from the Black Oxide finish, reducing maintenance frequency
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads
• Precise alignment and reduced wear with a 2 3/4" shoulder length and standard shoulder fit
• Secure, non-slip installation thanks to the knurled socket head and hex drive design
• Consistent thread engagement with UNC coarse threads and Class 2A fit for easy assembly
• Compliance with RoHS 3 and REACH standards for safe, environmentally responsible use

Professional Applications & Engineering Value

This 1/4"-20 shoulder screw is engineered to address common industrial challenges like misalignment and component wear. The 18-8 Stainless Steel material offers excellent corrosion resistance, while the Black Oxide finish adds an extra layer of protection against abrasion. The 2 3/4" shoulder length provides a precise pivot or bearing surface, minimizing friction in machinery assemblies. With a UNC coarse thread and Class 2A fit, it ensures quick, reliable fastening in applications such as robotics, automotive systems, and conveyor equipment. The knurled socket head and hex drive allow for secure tool engagement, reducing the risk of stripping during installation.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard tolerance. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting safe and regulated use in various industrial sectors.