S-91273A343 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise alignment and smooth rotation ensured by the 25mm shoulder with tight diameter tolerance (-0.04 to -0.01 mm)
• High-strength performance with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Secure torque transmission via the knurled socket head and 2mm hex drive, reducing tool slippage
• Reliable thread engagement with Class 5g6g metric coarse thread (M3 x 0.5mm) for consistent fastening
• Enhanced durability from Rockwell B55 hardness, resisting wear and deformation under load
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 25mm shoulder length provides a stable bearing surface for rotating components like gears and pulleys, minimizing misalignment and reducing wear. Made from 18-8 stainless steel, it offers excellent corrosion resistance in moist or chemical-exposed settings, while the knurled socket head and 2mm hex drive ensure efficient torque application without stripping. Ideal for machinery, automotive, and electronics, this metric shoulder screw delivers reliable performance in applications requiring high tensile strength and dimensional accuracy, supporting long-term operational integrity.

Specification Summary & Compliance

This shoulder screw features a Class 5g6g thread fit per metric standards, with a shoulder diameter tolerance of -0.04 to -0.01 mm and length tolerance of 0 to 0.25 mm for precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety requirements in industrial use.