S-94035A612 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
• Precise alignment and positioning ensured by a 1-1/2" shoulder with tight length tolerance (0" to 0.002")
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Reliable thread engagement with Class 2A UNC coarse threads for secure fastening and easy assembly
• Easy installation and removal using the standard hex socket head with 5/64" drive size
• Environmental compliance with RoHS 3 and REACH regulations for safe, sustainable use
• Dimensional stability from precise shoulder diameter tolerance (-0.001" to 0") for consistent fit

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered to solve critical alignment challenges in industrial assemblies, such as in machinery, automotive components, and electronic enclosures. The 18-8 stainless steel construction, combined with a passivated finish, provides exceptional resistance to corrosion and wear, extending service life in demanding conditions. The 1-1/2" shoulder length with tight tolerances allows for exact positioning of moving parts, reducing vibration and misalignment issues. Its hex socket head facilitates easy access in confined spaces, while the Class 2A thread fit ensures reliable fastening without cross-threading. Ideal for applications requiring precision shoulder screws, this component enhances assembly accuracy and reduces maintenance downtime.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent performance. Dimensions include a shoulder diameter of 1/8" with tolerance from -0.001" to 0", and shoulder length of 1-1/2" with tolerance 0" to 0.002". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for industrial use.