S-97345A290 3-48 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments
• Enhanced torque transmission from the knurled socket head and 5/64" hex drive, preventing tool slippage during installation
• Precise component alignment ensured by the 1 1/4" shoulder with tight diameter tolerance (-0.004" to -0.002")
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Reliable thread engagement due to Class 3A fit and UNC coarse thread, reducing cross-threading risks in assembly
• Long-term operational durability supported by Rockwell B79 hardness, maintaining structural integrity under stress
• Compliance with global regulations including RoHS 3 and REACH, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw addresses critical challenges in precision machinery, where misalignment and corrosion can lead to costly downtime. The UNC coarse thread with Class 3A fit enables rapid assembly in automated systems while maintaining vibration resistance. Its knurled socket head enhances grip for high-torque applications, preventing stripping in confined spaces. Commonly used in industrial equipment, robotics, and optical devices, the screw’s 1 1/4" shoulder acts as a precise axle or pivot, eliminating the need for additional bushings. The corrosion-resistant 316 material ensures reliability in chemical processing or outdoor settings, reducing maintenance cycles and total cost of ownership.

Specification Summary & Compliance

Manufactured to inch system standards with a Class 3A thread fit for high-precision assemblies. The shoulder diameter tolerance is held to -0.004" to -0.002", and length tolerance to -0.005" to 0.005". Thread specifications include 3-48 UNC coarse spacing and right-hand orientation. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety adherence for global supply chains.