S-90337A351 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
• Precision alignment capabilities with a precisely toleranced 1/2" shoulder diameter (-0.001" to 0") for accurate component positioning
• Easy installation and maintenance through low-profile socket head design with 1/4" hex drive, providing secure torque transmission
• Wide compatibility with UNC coarse 3/8"-16 threads in Class 2A fit, ensuring smooth engagement with standard components
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing
• Optimized shoulder length at 7/8" with tight tolerance (0" to 0.002") for consistent spacing and rotational stability

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw delivers critical engineering value in precision alignment applications where component positioning accuracy is paramount. The precise shoulder diameter with tight tolerance control eliminates play and misalignment in machinery assemblies, while the low-profile socket head with hex drive provides secure fastening in confined spaces. The passivated finish enhances corrosion resistance in demanding environments, extending service life in industrial equipment, automation systems, and precision instruments. The combination of 70,000 psi tensile strength and coarse UNC threads ensures reliable performance in high-vibration applications, making it ideal for pivot points, bearing retention, and alignment pins where dimensional stability and durability are essential.

Specification Summary & Compliance

This precision shoulder screw features Class 2A thread fit with UNC 3/8"-16 coarse threads and right-hand direction. Critical dimensions include shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002" for precise fitment. Manufactured from 18-8 stainless steel with Rockwell B55 hardness, the fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental responsibility and regulatory adherence for industrial applications.