S-92944A122 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Superior load-bearing capacity from 70,000 psi tensile strength and 35,000 psi minimum shear strength, ensuring reliable performance under high stress.
• Precise component alignment enabled by the 5/16" shoulder diameter and 1/2" shoulder length, reducing wear and simplifying assembly.
• Secure fastening and easy installation with a Class 3A thread fit for tight tolerances and a hex drive for high torque application without slippage.
• Optimized for flush mounting thanks to the flat head with an 82° countersink angle, providing a smooth finish and improved aesthetics.
• Enhanced durability and wear resistance from Rockwell B55 hardness, maintaining integrity through repeated use and vibration.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.

Professional Applications & Engineering Value

This 18-8 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. Its 1/4"-20 UNC coarse thread and Class 3A fit ensure vibration resistance and secure fastening in dynamic environments, reducing maintenance needs. The flat head with hex drive allows for high-torque installation, while the precisely machined shoulder provides stable alignment for rotating parts like gears and pulleys, minimizing misalignment and extending component life. Ideal for applications in manufacturing, automotive, and aerospace, this screw combines high tensile strength and corrosion resistance to deliver reliable performance where failure is not an option.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for precise threading and secure engagement. The shoulder diameter is 5/16" with a tolerance of -0.004" to -0.002", and shoulder length is 1/2" with a tolerance of -0.005" to 0.005", ensuring consistent dimensional accuracy. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industrial applications.