S-90324A164 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing maintenance costs
• Precise component alignment ensured by the 1/2" shoulder diameter and 1 1/2" shoulder length with tight tolerances
• Superior thread reliability with Class 3A fit and left-hand UNC coarse threading, providing secure fastening in specialized applications
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding industrial loads
• Easy installation and removal facilitated by the 1/4" hex socket drive and knurled head for improved grip
• Long-term durability supported by Rockwell B55 hardness, resisting wear and deformation
• Compliance with global standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries

Professional Applications & Engineering Value

This left-hand thread shoulder screw is engineered to address critical alignment and reverse-thread requirements in precision machinery, automation systems, and rotating assemblies. The 18-8 Stainless Steel material provides excellent corrosion resistance, reducing failure risks in moist or chemical-exposed environments. Its 1/2" shoulder diameter and precise 1 1/2" shoulder length allow for accurate positioning of components like gears, bearings, and linkages, minimizing misalignment and vibration. The Class 3A thread fit and coarse UNC threading ensure secure engagement in high-vibration settings, while the left-hand thread direction prevents loosening in clockwise-rotating mechanisms. Combined with a knurled head and hex socket drive, it offers reliable fastening for maintenance-heavy industrial applications, enhancing operational safety and reducing downtime.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 3A thread fit for high precision. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 1 1/2" with a tolerance of -0.005" to 0.005", ensuring consistent alignment. Manufactured from 18-8 Stainless Steel, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting use in regulated industrial and electronic sectors.