S-90337A343 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Precise alignment and pivot functionality due to the 3/8" shoulder diameter with tight tolerances for reduced assembly play.
• High strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness, ensuring reliable performance under load.
• Easy installation in confined spaces using the low-profile socket head and 3/16" hex drive for secure, flush mounting.
• Quick assembly with coarse UNC threads (1/4"-20) and Class 2A fit, providing consistent engagement and vibration resistance.
• Compliance with global regulations including RoHS 3 and REACH, making it suitable for international industrial applications.
• Versatile right-hand threading for standard directional fastening in machinery, jigs, and rotating assemblies.

Professional Applications & Engineering Value

This low profile socket head shoulder screw is engineered to address critical alignment and wear issues in precision assemblies. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, extending service life in demanding conditions like manufacturing equipment and automation systems. The 3/8" shoulder diameter with precise tolerances acts as a reliable pivot or spacer, minimizing misalignment and reducing stress on threaded sections. Its 1/4"-20 UNC coarse thread ensures rapid installation and secure holding power, while the hex drive and low-profile head design allow for tool access in tight spaces. Ideal for use in industrial machinery, jigs, fixtures, and rotating components, this shoulder screw delivers consistent performance where accuracy and durability are paramount.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit for consistent engagement and features a shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002" for precise assembly. Manufactured to UNC thread standards with a right-hand thread direction, it ensures compatibility with standard components. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial applications.