S-94035A132 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 the 1/8" shoulder diameter with tight tolerance for reduced vibration and wear
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty fastening
• Easy installation and removal with hex socket drive design requiring only a 5/64" hex key for efficient maintenance
• Consistent thread engagement through UNC coarse threads with Class 2A fit, preventing cross-threading in assembly
• Durable surface protection via passivation that enhances oxide layer, extending service life against chemical exposure
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material combined with a passivated finish provides exceptional resistance to oxidation and chemical corrosion, making it suitable for applications in machinery, automotive, and electronics where environmental factors are a concern. The 1/8" shoulder diameter with precise tolerance ensures accurate positioning of moving parts, reducing misalignment and minimizing wear on components. Its coarse UNC threads and Class 2A fit facilitate quick, secure fastening, while the socket head design allows for compact installation in confined spaces. Ideal for use in pivots, gears, and linkages, this shoulder screw delivers reliable performance and long-term value in demanding industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features a diameter of 1/8" with a tolerance of -0.001" to 0" and a length of 11/32" with 0" to 0.002" tolerance, ensuring precise fit in assembly. Manufactured from 18-8 stainless steel and finished with passivation, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for use in regulated and environmentally conscious industries.