S-91054A476 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Wear Resistance - TiCN coating significantly increases surface hardness and reduces friction, extending service life in high-wear applications.
• Superior Corrosion Protection - 18-8 Stainless Steel construction combined with TiCN coating provides excellent resistance to rust and chemical degradation in harsh environments.
• High-Strength Performance - 70,000 psi tensile strength and Rockwell B55 hardness ensure reliable fastening under substantial mechanical loads and vibration.
• Precision Shoulder Alignment - Tight shoulder diameter tolerance (-0.002" to 0") and length tolerance (0" to 0.003") guarantee accurate component positioning and rotational stability.
• Optimized Thread Engagement - Class 2A UNC coarse threads with 3/16" length deliver secure, vibration-resistant connections while facilitating quicker assembly.
• Secure Hex Drive Operation - 3/32" hex socket drive provides positive torque transmission and prevents stripping during high-torque installation.
• Regulatory Compliance Assurance - Meets RoHS 3 and REACH environmental standards, ensuring safe use in regulated industrial applications.

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw delivers critical engineering solutions where precise component alignment and rotational accuracy are paramount. The 18-8 stainless steel base material provides fundamental corrosion resistance, while the advanced TiCN coating creates an ultra-hard surface (exceeding 80 Rc equivalent) that dramatically reduces galling and wear in high-cycle applications. The precision shoulder with tight diameter and length tolerances acts as a reliable locating dowel in assemblies, eliminating play in rotating components like gears, pulleys, and linkages. Combined with the Class 2A thread fit and 70,000 psi tensile strength, this fastener maintains joint integrity in vibrating environments while the coarse UNC threads provide excellent engagement in both metallic and plastic components. Ideal for precision machinery, automation systems, and medical equipment where reliability and repeatability are critical.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder dimensions (diameter: 3/16" [-0.002" to 0"], length: 1/8" [0" to 0.003"]). Manufactured from 18-8 stainless steel with TiCN coating and rated for 70,000 psi tensile strength with Rockwell B55 hardness. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for industrial safety and environmental protection.