S-93856A373 M20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing replacement frequency.
• Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under high-stress loads.
• Precise component alignment enabled by the 20mm shoulder diameter with tight tolerance, minimizing play and vibration.
• Secure, non-slip fastening thanks to the knurled hex socket head and 10mm drive, allowing for high-torque application.
• Versatile installation length with a shoulder length adjustable from 13mm to 49.75mm, accommodating various assembly requirements.
• Guaranteed thread interchangeability via Class 5g6g metric coarse thread (M20x2.5), ensuring compatibility with standard nuts and tapped holes.
• Compliance with strict environmental regulations including RoHS 3 and REACH, making it suitable for global supply chains and sensitive applications.

Professional Applications & Engineering Value

This M20 shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, which is vital in moist or chemically aggressive environments. Its precision shoulder acts as a pivot or axle, ensuring accurate positioning of moving parts like gears, pulleys, and linkages, thereby reducing wear and maintenance downtime. The hex socket head with knurling offers a secure grip for tools, preventing cam-out during high-torque assembly. With a coarse thread pitch and Class 5g6g thread fit, it allows for quick installation and reliable holding power in dynamic applications such as automotive assemblies, conveyor systems, and heavy-duty equipment, where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This shoulder screw adheres to Metric system standards with an M20x2.5 coarse right-hand thread and Class 5g6g thread fit for consistent engagement. The shoulder diameter is manufactured to a tight tolerance of -0.072 to -0.01 mm, and the shoulder length tolerance is -0.05 to 0.05 mm, ensuring high dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial and consumer products without hazardous substances.