S-91273A329 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Precise component alignment ensured by the 13mm shoulder length with controlled tolerance, reducing wear and simplifying assembly.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable use in demanding mechanical applications.
• Secure and efficient installation using the 2 mm hex socket drive and knurled head, providing excellent grip and preventing tool slippage.
• Accurate and reliable threading with Class 5g6g fit M3x0.5mm coarse pitch, ensuring consistent engagement and vibration resistance.
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards, making it safe for various industrial and international markets.
• Durable shear resistance with a minimum shear strength of 35,000 psi, supporting high-stress applications without failure.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The 18-8 stainless steel material offers excellent resistance to rust and chemicals, making it suitable for precision machinery, automotive assemblies, and electronic enclosures. The 13mm shoulder length provides a stable bearing surface that maintains precise part spacing, reducing friction and wear in rotating components. Combined with the hex socket drive and knurled head texture, it allows for secure tightening in confined spaces, enhancing assembly efficiency and reliability. Its Class 5g6g thread with coarse pitch ensures quick installation and robust performance in high-vibration environments, delivering long-term value and reduced maintenance costs.

Specification Summary & Compliance

This shoulder screw features a metric M3x0.5mm coarse pitch thread with Class 5g6g fit for precise tolerance. The shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring consistent dimensional accuracy. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.