S-94496A620 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior Load Distribution - The 2" shoulder length provides stable bearing surface for rotating components, reducing wear and extending equipment life
• High Tensile Performance - 70,000 psi tensile strength ensures reliable fastening in demanding industrial applications
• Enhanced Corrosion Protection - Zinc plating offers excellent rust resistance for extended service life in various environments
• Precision Thread Engagement - Class 2A thread fit with 1/4"-20 UNC coarse threads ensures consistent, reliable assembly and disassembly
• Optimized Shear Resistance - 35,000 psi minimum shear strength provides secure fastening under lateral loads and vibration
• Easy Installation & Maintenance - External hex drive with 5/8" head width allows for standard wrench access in confined spaces
• Regulatory Compliance Assurance - Meets RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This steel shoulder screw with UNC coarse threading and zinc plating delivers exceptional engineering value in precision applications where alignment and pivot points are critical. The extended 2" shoulder length provides precise spacing and rotational support for gears, pulleys, and linkages, eliminating the need for additional spacers or bushings. The Rockwell B80 hardness ensures dimensional stability under load, while the coarse thread design resists loosening in high-vibration environments common in manufacturing equipment, automotive assemblies, and industrial machinery. The combination of 70,000 psi tensile strength and corrosion-resistant zinc plating makes this shoulder screw ideal for applications requiring both mechanical reliability and environmental durability.

Specification Summary & Compliance

This precision shoulder screw features Class 2A thread fit tolerance with 1/4"-20 UNC coarse threading, ensuring consistent engagement and reliable performance. The shoulder maintains precise dimensional control with diameter tolerance of -0.004" to 0" and length tolerance of -0.005" to 0.005". Manufactured to meet RoHS 3 (2015/863/EU) compliance with exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) compliance, ensuring environmental responsibility and regulatory adherence for industrial applications.