S-91273A743 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment ensured by the 2" shoulder with tight diameter tolerance for reduced vibration and wear
• High-strength performance with 70,000 psi tensile and 35,000 psi shear strength for demanding mechanical applications
• Easy installation and removal using the hex socket drive and knurled head for secure tool grip
• Reliable thread engagement with UNC coarse threads and Class 2A fit for quick assembly and consistent clamping force
• Enhanced durability from Rockwell B55 hardness, resisting deformation under heavy loads
• Compliance with environmental standards including RoHS 3 and REACH for safe use in regulated industries

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial machinery, automated systems, and precision equipment. The 2" shoulder length provides a stable bearing surface that minimizes misalignment and reduces stress on moving parts, while the 18-8 stainless steel material offers excellent resistance to corrosion and oxidation in demanding environments. The hex socket drive combined with a knurled head ensures secure tool engagement during installation, preventing slippage and damage. With coarse UNC threads and Class 2A fit, it enables rapid assembly and disassembly, making it ideal for applications requiring frequent maintenance or adjustments. This screw delivers reliable performance in pivoting mechanisms, gear assemblies, and rotational fixtures, where precision and durability are paramount.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 2A fit for standard tolerance, a shoulder diameter of 3/8" with tolerance of -0.004" to -0.002", and a shoulder length of 2" with tolerance of -0.005" to 0.005". It is manufactured from 18-8 stainless steel with a hardness of Rockwell B55, tensile strength of 70,000 psi, and minimum shear strength of 35,000 psi. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.