S-90324A168 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise left-hand thread engagement with Class 3A fit ensures reliable performance in reverse-threading applications
• Superior load-bearing capability with 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical assemblies
• Enhanced grip and tool engagement through knurled head texture and 1/4" hex drive for secure installation
• Accurate component alignment with 2" shoulder length maintaining strict dimensional tolerances for precision machinery
• Optimized thread performance with UNC coarse threading providing faster assembly and reduced cross-threading risk
• Compliance with environmental regulations including RoHS 3 and REACH for global industrial applications

Professional Applications & Engineering Value

This left-hand thread shoulder screw addresses critical engineering challenges in applications requiring reverse-threading security and precise component positioning. The 18-8 stainless steel construction delivers excellent corrosion resistance while maintaining Rockwell B55 hardness for durability in demanding environments. The 2" shoulder length with tight tolerances ensures accurate alignment of moving parts in machinery, while the 3/8"-16 UNC coarse thread provides reliable fastening in high-vibration applications. The socket head design with knurled texture enables secure tool engagement during installation, particularly valuable in confined spaces where conventional fasteners might slip. These features make it ideal for precision equipment, rotating assemblies, and specialized machinery where reverse-threading prevents loosening under operational stresses.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit for superior engagement. Shoulder diameter tolerance maintained at -0.004" to -0.002" and shoulder length tolerance at -0.005" to 0.005" for consistent performance. Thread specifications conform to UNC coarse thread standards with left-hand direction. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial applications worldwide.