S-91273A504 M20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for high-load applications and reliable performance.
• Precise alignment and location ensured by the standard shoulder fit with controlled diameter and length tolerances.
• Secure, non-slip fastening provided by the knurled head texture and 10 mm hex socket drive for high-torque installation.
• Wide compatibility and easy assembly with a standard M20x2.5 coarse metric thread and Class 5g6g fit for common industrial components.
• Enhanced durability from Rockwell B55 hardness, resisting wear and deformation under repeated use.
• Compliance with global standards, being RoHS 3 and REACH compliant for use in regulated markets and sensitive applications.

Professional Applications & Engineering Value

This M20 shoulder screw is engineered to address critical alignment and high-stress challenges in industrial applications. Made from 18-8 stainless steel, it provides excellent resistance to corrosion and oxidation, making it suitable for machinery, automotive assemblies, and precision equipment operating in demanding conditions. The hex socket head with a knurled texture ensures a firm grip, preventing slippage during high-torque tightening. The standard shoulder with precise tolerances allows for accurate component positioning, reducing misalignment and wear. With a coarse metric thread (M20x2.5) and Class 5g6g fit, it facilitates quick assembly and disassembly, enhancing maintenance efficiency in production lines and heavy-duty systems.

Specification Summary & Compliance

This shoulder screw features a Class 5g6g thread fit per metric standards, ensuring dimensional accuracy and interchangeability. The shoulder diameter is 20 mm with a tolerance of -0.04 to -0.01 mm, and the shoulder length is 25 mm with a tolerance of 0 to 0.25 mm for precise fitment. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial uses.