S-97345A270 3-48 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and chemical exposure
• Exceptional thread precision with Class 3A fit for reliable, vibration-resistant assemblies and reduced risk of cross-threading
• High mechanical strength offering 70,000 psi tensile strength and 35,000 psi shear strength for demanding load applications
• Secure installation and grip from the knurled head and hex socket drive, preventing tool slippage during tightening
• Accurate component alignment with a precisely machined 1/8" shoulder diameter and controlled tolerances
• Broad industrial compliance meeting RoHS 3 and REACH environmental regulations for global supply chain use
• Optimized for coarse threading with UNC 3-48 right-hand threads for faster assembly in general-purpose applications

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining alignment in rotating parts and resisting loosening under vibration. The Class 3A thread fit ensures tight tolerances, reducing the need for secondary locking mechanisms, while the knurled head enhances grip during manual adjustments. Its 1/8" shoulder diameter provides a reliable bearing surface for gears, linkages, or spacers, minimizing wear in machinery, automotive, and electronic enclosures. The hex socket drive allows for high-torque installation in confined spaces, and the material's inherent corrosion resistance makes it suitable for marine, chemical processing, and outdoor equipment where moisture and chemicals are present.

Specification Summary & Compliance

This shoulder screw adheres to UNC 3-48 coarse thread specifications with a Class 3A thread fit for precision assembly. Key dimensional attributes include a shoulder diameter of 1/8" (tolerance: -0.004" to -0.002") and shoulder length of 1/4" (tolerance: -0.005" to 0.005"). It is manufactured from 316 stainless steel with a hardness of Rockwell B79 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.