S-90337A494 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional wear resistance from TiCN coating, extending service life in high-friction applications
• Precise component alignment through controlled shoulder diameter tolerance (-0.001" to 0") and smooth surface finish
• Superior corrosion resistance with 18-8 stainless steel construction for demanding industrial environments
• High strength-to-weight ratio delivering 70,000 psi tensile strength while maintaining Rockwell B55 hardness
• Secure fastening performance with Class 2A thread fit ensuring reliable engagement in coarse UNC threading
• Space-saving low profile design with socket head configuration for confined assembly spaces
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for global manufacturing applications

Professional Applications & Engineering Value

This precision shoulder screw solves critical alignment challenges in industrial machinery, automation systems, and precision instruments. The 18-8 stainless steel base material provides excellent corrosion resistance, while the TiCN coating significantly enhances surface hardness and reduces galling in repetitive assembly operations. The 1" shoulder length with precise diameter control ensures accurate component positioning, eliminating misalignment issues in rotating assemblies and bearing applications. The 5/16"-18 UNC coarse thread with Class 2A fit facilitates quick installation while maintaining secure fastening integrity. The low profile socket head with 5/32" hex drive allows for efficient torque application in space-constrained environments, making it ideal for precision manufacturing equipment, robotic assemblies, and motion control systems where dimensional stability and repeatable performance are paramount.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002". Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The combination of 70,000 psi tensile strength and Rockwell B55 hardness ensures mechanical performance meets industrial requirements for shoulder screw applications demanding both precision and durability.