S-90337A456 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 Stainless Steel construction with passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty performance
• Precise alignment and smooth rotation enabled by the precisely machined shoulder with controlled diameter and length tolerances
• Space-saving low-profile socket head with 5/32" hex drive allows for installation in confined spaces while providing secure torque transmission
• Reliable and quick assembly with coarse 1/4"-20 UNC threading and Class 2A fit, ensuring consistent engagement and reduced cross-threading risk
• Broad regulatory compliance including RoHS 3 and REACH, meeting stringent international environmental and safety standards
• Optimized for right-hand applications with standard thread direction for compatibility with common assembly processes

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in mechanical assemblies. The 18-8 Stainless Steel material, enhanced by a passivated finish, provides excellent resistance to oxidation and chemical exposure, making it suitable for automotive, aerospace, and food processing equipment. The low-profile socket head design minimizes protrusion while the 5/32" hex drive ensures high torque capability without stripping. The 7/16" shoulder length acts as a precise pivot or spacer, reducing wear on moving parts and maintaining alignment in industrial shoulder bolt applications. Its 1/4"-20 UNC coarse thread and Class 2A fit guarantee secure fastening in high-vibration environments, delivering long-term reliability and reduced maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features precise tolerances (diameter: -0.001" to 0", length: 0" to 0.002") to ensure exact fitment. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial use without hazardous substances.