S-93996A346 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking: Integrated nylon patch ensures secure, permanent fastening in high-vibration environments without requiring separate adhesives.
• Superior corrosion resistance: 18-8 Stainless Steel construction provides excellent durability against rust and corrosion in demanding industrial settings.
• Precise component alignment: The 1" shoulder with precise fit tolerance acts as a reliable axle or pivot, ensuring accurate assembly and reducing wear.
• High mechanical strength: With a tensile strength of 70,000 psi and Rockwell B55 hardness, it withstands heavy loads and repetitive stress.
• Wide temperature tolerance: Nylon patch remains effective from -70° to 250°F, maintaining lock integrity in extreme operating conditions.
• Easy installation and removal: Standard socket head design allows for high-torque application with common hex keys, speeding up assembly and maintenance.
• Guaranteed dimensional accuracy: Class 2A thread fit and precise shoulder diameter ensure consistent performance and interchangeability in automated systems.

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw is engineered to solve critical alignment and retention challenges in precision assemblies. The 1" shoulder length with minimal tolerance provides a stable bearing surface for rotating components like gears, pulleys, and linkages, eliminating misalignment and reducing friction-induced wear. Manufactured from 18-8 Stainless Steel, it offers inherent corrosion resistance for use in machinery, automotive, and electronic enclosures exposed to moisture or chemicals. The integrated nylon patch locking feature secures the coarse UNC thread against loosening under dynamic loads, making it ideal for applications subject to vibration or thermal cycling. Its socket head design facilitates compact installations where space is constrained, while the high tensile strength ensures long-term reliability in structural fastening points.

Specification Summary & Compliance

This shoulder screw features 8-32 UNC coarse threads with a Class 2A thread fit for consistent engagement and assembly ease. The shoulder diameter is maintained at 3/16" with a tight tolerance of -0.001" to 0", and the shoulder length is precisely controlled at 1" (0" to 0.002" tolerance). The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and suitable for global industrial and electronic applications.