S-91273A518 M20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear resistance for reliable performance under load.
• Precise alignment and smooth rotation enabled by the 110mm shoulder with tight diameter tolerance of -0.04 to -0.01 mm.
• Secure and easy installation with a 10mm hex socket drive and knurled head for improved grip and torque application.
• Accurate thread engagement with Class 5g6g fit and M20x2.5 coarse thread, ensuring consistent fastening in metric assemblies.
• Durable and wear-resistant material with Rockwell B55 hardness, extending service life in repetitive motion applications.
• Compliance with environmental standards including RoHS 3 and REACH, making it safe for regulated industries.

Professional Applications & Engineering Value

This M20x2.5 shoulder screw is engineered to address common challenges in precision machinery, such as misalignment and component wear. The 18-8 stainless steel provides excellent resistance to rust and corrosion, crucial for applications in manufacturing, automation, and outdoor equipment. The 110mm shoulder length with minimal tolerance ensures accurate positioning of moving parts like gears and pulleys, reducing vibration and enhancing operational smoothness. The hex socket head with knurling allows for secure tool engagement, preventing slippage during high-torque assembly. Ideal for use in industrial shoulder screw applications requiring high tensile strength and durability, this component supports efficient production and minimal downtime.

Specification Summary & Compliance

This shoulder screw features a metric thread with M20 size, 2.5 mm pitch, and Class 5g6g thread 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 high dimensional accuracy. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for global industrial standards.