S-97768A419 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
• Exceptional mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for heavy-duty applications
• Precision alignment and secure positioning ensured by the 1/2" shoulder diameter with tight tolerances (±0.005")
• Reliable thread engagement with Class 3A thread fit and UNC coarse threads for vibration resistance
• Enhanced installation grip via the knurled socket head and 1/4" hex drive, reducing tool slippage
• Broad compliance meeting ASME B18.3 standards, RoHS 3, and REACH for global industrial use
• Durable performance backed by Rockwell B55 hardness for long-term wear resistance

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The 1/2" shoulder diameter with minimal tolerance variations provides a stable pivot or bearing surface, eliminating misalignment in machinery, automotive, and robotics applications. Made from 18-8 stainless steel with a black oxide finish, it resists corrosion and oxidation in demanding environments. The knurled socket head and coarse UNC threads ensure secure fastening under vibration, while the high tensile and shear strengths support heavy dynamic loads, reducing maintenance needs and enhancing operational reliability.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards for precise engagement. Shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005". It conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability.