S-94035A522 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion-resistant performance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Precise alignment capabilities due to controlled 1/2" shoulder length with tight tolerances for accurate component positioning
• High-strength reliability offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Secure hex drive engagement with 5/64" drive size preventing cam-out and ensuring proper installation torque
• Consistent thread performance with Class 2A UNC coarse threads providing reliable fastening in various materials
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Smooth socket head profile enabling flush mounting and reduced protrusion in compact assemblies

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw delivers exceptional engineering value in precision alignment applications where component positioning is critical. The 18-8 stainless steel material combined with passivated finish provides superior corrosion resistance, making it ideal for industrial environments exposed to moisture, chemicals, or temperature variations. The precisely controlled 1/2" shoulder length with tight tolerances ensures accurate spacing and alignment in machinery, automation systems, and precision instruments. The hex drive socket head allows for high-torque installation without slippage, while the Class 2A UNC threads offer reliable engagement in both metallic and non-metallic materials. These shoulder screws are particularly valuable in applications requiring rotational freedom or serving as pivots, axles, or dowels in assembled components.

Specification Summary & Compliance

This precision shoulder screw features 4-40 UNC Class 2A threads with right-hand direction and coarse spacing, ensuring standard compatibility across industrial applications. The shoulder diameter maintains a tight tolerance of -0.001" to 0" while the shoulder length is controlled within 0" to 0.002" for precise fitment. Manufactured from 18-8 stainless steel with passivated finish, the screw delivers consistent mechanical properties including 70,000 psi tensile strength and Rockwell B55 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.