S-93856A383 M20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing long-term replacement costs.
• High-strength performance offering a tensile strength of 70,000 psi and a shear strength of 35,000 psi for reliable load-bearing in demanding applications.
• Precise component alignment enabled by the standardized shoulder diameter of 20 mm, ensuring accurate positioning and reduced assembly wear.
• Secure and efficient installation with a 10 mm hex socket drive and knurled head, providing excellent grip and torque transmission while minimizing tool slippage.
• Consistent thread engagement due to the Class 5g6g thread fit and M20x2.5 coarse pitch, facilitating faster assembly and improved vibration resistance.
• Enhanced durability and hardness with a Rockwell B55 rating, ensuring the screw maintains its integrity under repeated stress and mechanical forces.
• Compliance with global environmental standards including RoHS 3 and REACH, making it a safe and responsible choice for various international markets.

Professional Applications & Engineering Value

This M20 shoulder screw is engineered to address critical challenges in precision machinery and assembly lines. Manufactured from 18-8 Stainless Steel, it provides excellent resistance to rust and corrosion, which is vital for equipment operating in humid or chemically aggressive settings. The hex socket drive and knurled head design allow for high-torque installation without stripping, reducing downtime during maintenance. The Class 5g6g thread fit and coarse M20x2.5 metric thread ensure reliable fastening in dynamic applications where vibration loosening is a concern. Commonly used in robotics, conveyor systems, and fixture manufacturing, this precision shoulder bolt offers a robust solution for aligning gears, bearings, and other rotating components, thereby enhancing overall system accuracy and lifespan.

Specification Summary & Compliance

This shoulder screw adheres to metric system specifications with a thread size of M20 and a pitch of 2.5 mm. The thread fit conforms to Class 5g6g tolerance standards, ensuring precise and consistent threading. Shoulder diameter tolerance is maintained between -0.072 to -0.01 mm, and shoulder length tolerance from -0.05 to 0.05 mm, guaranteeing high dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industrial and commercial applications.