S-91273A474 M12 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• High strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness, ensuring reliable performance under heavy loads.
• Precise alignment and smooth rotation provided by the 50mm shoulder with tight diameter tolerance, reducing wear on mating components.
• Efficient torque transmission via the 6mm hex socket drive, minimizing slippage and enabling secure installation in confined spaces.
• Consistent and reliable threading with Class 5g6g metric coarse thread (M12x1.75mm), ensuring easy assembly and vibration resistance.
• Secure grip during manual handling thanks to the knurled head texture, improving installation safety and control.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global industrial supply chains.

Professional Applications & Engineering Value

This M12 shoulder screw is engineered to address common challenges in precision machinery, automation systems, and assembly jigs. The 18-8 stainless steel material offers excellent corrosion resistance, which is critical in moist or chemically aggressive settings, reducing maintenance and replacement costs. The 50mm shoulder length with controlled tolerances acts as a precise pivot or spacer, minimizing misalignment and bearing wear in rotating assemblies. Combined with the hex socket drive and coarse thread, it ensures high clamp load retention and efficient installation in high-vibration environments like motor mounts and conveyor systems. These features make it a reliable choice for engineers seeking durability, precision, and regulatory compliance in industrial applications.

Specification Summary & Compliance

The screw features a Class 5g6g thread fit per metric standards, ensuring dimensional accuracy and interchangeability. The shoulder diameter tolerance is tightly controlled at -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm for precise engineering fits. It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for environmentally conscious manufacturing and industrial use.