S-91273A514 M20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh or washdown environments.
• Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for heavy-duty, high-load applications.
• Precise component alignment ensured by the 70mm shoulder with a tight diameter tolerance for reduced wear and vibration.
• Reliable, secure fastening from the Class 5g6g thread fit, providing consistent clamping force and resistance to loosening.
• Easy installation and removal with the 10mm hex socket drive and knurled head for superior grip, even with gloves.
• Long-term durability supported by a Rockwell B55 hardness, offering excellent wear resistance over the product lifecycle.
• Compliance with global environmental standards (RoHS 3 & REACH) for use in regulated markets and sustainable operations.

Professional Applications & Engineering Value

This M20 shoulder screw is engineered to solve critical challenges in precision industrial applications. The 18-8 stainless steel material provides excellent corrosion resistance, essential for machinery in humid, chemical, or food-processing environments. The 70mm shoulder length acts as a precise pivot, axle, or spacer, maintaining exact alignment in assemblies and reducing stress on the Class 5g6g metric thread. This design prevents misalignment, minimizes bushing wear, and extends the service life of rotating components. Combined with the 10mm hex drive and knurled head for secure tool engagement, this fastener delivers reliable performance in automated equipment, conveyor systems, and other high-shear strength applications.

Specification Summary & Compliance

This precision shoulder screw adheres to metric system standards with an M20x2.5 coarse thread and a Class 5g6g thread fit for consistent assembly. The shoulder features a diameter of 20 mm with a tolerance of -0.04 to -0.01 mm and a length of 70 mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy. The product is manufactured from 18-8 Stainless Steel and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.