S-90337A382 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment ensured by the 1/8" diameter shoulder with tight tolerance (-0.001" to 0")
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing
• Space-saving low-profile socket head with 5/64" hex drive for easy installation in confined areas
• Consistent thread engagement with Class 2A UNC coarse threads for quick assembly and vibration resistance
• Extended service life due to smooth head texture and durable material, reducing replacement frequency
• Environmental compliance meeting RoHS 3 and REACH standards for safe, sustainable industrial use

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered to solve critical alignment challenges in precision machinery, automation systems, and electronic assemblies. The 18-8 stainless steel material provides excellent corrosion resistance, while the low-profile socket head with 5/64" hex drive allows secure fastening in tight spaces. The 1/8" diameter shoulder with precise fit tolerance ensures accurate positioning of rotating parts, reducing wear and misalignment in applications like pivots, gears, and linkages. Its Class 2A UNC coarse threads offer reliable engagement and vibration resistance, making it a trusted solution for industrial equipment requiring durability and repeatable performance.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with Class 2A thread fit for consistent dimensional accuracy. The shoulder diameter tolerance is -0.001" to 0", and shoulder length tolerance is 0" to 0.002", ensuring precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial markets.