S-91273A477 M12 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Superior strength and durability with a tensile strength of 70,000 psi and Rockwell B55 hardness, ensuring reliable performance under high-stress conditions.
• Precise alignment and smooth rotation provided by the 80mm shoulder with a tight diameter tolerance, minimizing wear on mating components.
• Secure and efficient installation using the 6mm hex socket drive and knurled head, preventing tool slippage and enabling high-torque application.
• Wide compatibility and reliable threading with a Class 5g6g M12x1.75 coarse thread, ensuring a secure fit in accordance with metric standards.
• Environmental and regulatory compliance with RoHS 3 and REACH standards, making it suitable for global supply chains and sensitive applications.

Professional Applications & Engineering Value

This M12 shoulder screw is engineered to address critical alignment and pivot point requirements in demanding assemblies. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, which is vital for machinery operating in humid or chemically aggressive settings. The long, precision-machined 80mm shoulder acts as a built-in spacer or bearing surface, eliminating the need for additional bushings and reducing assembly complexity. The hex socket drive and knurled head provide a secure grip for tools, allowing for high clamping force without damaging the fastener head. This combination of a robust shoulder diameter and a coarse M12x1.75 thread makes it an ideal choice for applications in automation equipment, conveyor systems, and precision jigs where shear strength and dimensional stability are paramount.

Specification Summary & Compliance

This shoulder screw features a Class 5g6g thread fit per metric standards, ensuring consistent and reliable engagement. The shoulder diameter is manufactured to a tight tolerance of -0.04 to -0.01 mm, and the shoulder length tolerance is 0 to 0.25 mm, guaranteeing high precision for alignment-critical applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.