S-90337A344 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-lasting performance in harsh environments.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing in demanding applications.
• Precise component alignment enabled by the accurately machined shoulder with tight diameter and length tolerances for minimal play and vibration.
• Easy installation and high torque capability via the low-profile hex socket head, allowing efficient assembly in confined spaces.
• Wide compatibility and secure fastening with 3/8"-16 UNC coarse threads and Class 2A fit, ensuring consistent engagement and reduced cross-threading risk.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global industrial supply chains.
• Durable and smooth surface from the passivated finish, which enhances wear resistance and simplifies cleaning.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision instruments. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, extending service life in moist or chemically aggressive settings. The 1/2" shoulder diameter with precise tolerances ensures accurate positioning of moving parts like gears, pulleys, and linkages, reducing wear and maintenance downtime. The hex socket head with a low profile allows for compact design integration and secure torque application, while the 3/8"-16 UNC coarse threads facilitate quick assembly and disassembly. Ideal for applications requiring reliable shoulder fit and high tensile strength, this screw enhances operational efficiency and safety in sectors such as robotics, automotive, and aerospace.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. The shoulder features a diameter tolerance of -0.001" to 0" and length tolerance of 0" to 0.002" for precise assembly. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets stringent environmental and safety requirements for industrial use.