S-94128A168 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior Alignment Accuracy with a precisely machined 3/8" shoulder diameter and tight tolerance (-0.001" to 0") ensuring exact component positioning in assemblies.
• Enhanced Durability & Wear Resistance from Alloy Steel construction hardened to Rockwell C32, providing long service life in demanding industrial environments.
• Reliable Thread Engagement with Class 3A UNC coarse threads (5/16"-18) offering superior fit and vibration resistance in high-stress applications.
• Simplified Installation & Maintenance through the headless slotted drive design, allowing easy access in confined spaces without compromising torque application.
• Right-Hand Coarse Thread Efficiency enabling quick assembly and disassembly while maintaining secure fastening in dynamic load conditions.
• Regulatory Compliance Assurance meeting RoHS 3 and REACH standards for safe use in regulated industries and international markets.
• Optimized Shoulder Length Control with minimal tolerance (0" to 0.005") ensuring consistent spacing and alignment across production runs.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to solve critical alignment challenges in precision machinery, automation systems, and rotating assemblies. The headless slotted drive design allows flush mounting in tight spaces while the 3/8" shoulder diameter with precise fit tolerance acts as a reliable pivot or bearing surface. The Class 3A UNC coarse thread maintains secure fastening under vibration, making it ideal for industrial equipment, robotic arms, and precision instruments where component misalignment causes operational failures. The Rockwell C32 hardness ensures the shoulder withstands repeated lateral loads without deformation, extending maintenance intervals in high-cycle applications.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit per UNC specifications and precise shoulder diameter tolerance (-0.001" to 0"). Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety. The shoulder length maintains 0" to 0.005" tolerance for consistent precision alignment across industrial applications.