S-94035A141 4-40 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 component alignment ensured by a 1/8" diameter shoulder with tight ±0.002" length tolerance for reliable assembly
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Secure and efficient installation via a 5/64" hex socket drive, preventing cam-out and enabling high torque application
• Reliable thread engagement with Class 2A UNC coarse threads for consistent fastening and vibration resistance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Versatile right-hand threading compatible with standard UNC components, simplifying sourcing and replacement

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered to solve critical alignment challenges in precision assemblies. The 1/8" shoulder diameter with minimal tolerance acts as a precise pivot or spacer, eliminating misalignment in machinery, robotics, and electronic enclosures. Manufactured from 18-8 stainless steel with a passivated finish, it resists oxidation and chemical exposure, extending service life in humid or corrosive settings. The socket head design with hex drive allows for compact installation in confined spaces, while the Class 2A thread fit ensures smooth engagement without cross-threading. Ideal for securing gears, bearings, and linkages, this screw provides repeatable accuracy and 70,000 psi tensile strength for high-stress industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent performance. The shoulder features a diameter of 1/8" with a tolerance of -0.001" to 0", and a length of 1" with a tolerance of 0" to 0.002" for precise fit. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for industrial use.