S-90265A588 M3 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or chemically aggressive industrial environments.
• Enhanced durability and wear resistance from the black oxide finish, which also reduces light reflection for discreet applications.
• Precise component alignment and pivot points thanks to the 20mm shoulder with tight diameter tolerance for minimal play.
• High-strength performance under load, offering 70,000 psi tensile strength and 45,000 psi shear strength for demanding mechanical assemblies.
• Secure, non-slip installation with the knurled socket head and 2.5 mm hex drive, preventing tool slippage during torque application.
• Reliable thread engagement with Class 5g6g thread fit, ensuring consistent fastening in metric coarse threaded applications.
• Broad regulatory compliance meeting ISO 7379, RoHS 3, and REACH standards for global use in sensitive sectors.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and rotational movement challenges in precision assemblies. The 20mm shoulder length with controlled tolerances acts as a precise spacer or pivot, eliminating the need for additional bushings in machinery, automotive, and electronics. Manufactured from 18-8 stainless steel, it resists rust and oxidation, while the black oxide finish enhances surface hardness and reduces galling. The knurled socket head ensures positive grip during installation, reducing the risk of damage in high-torque scenarios. Ideal for applications requiring repeated disassembly, this metric shoulder screw maintains dimensional stability and Class 5g6g thread fit for reliable performance in automated systems and precision instruments.

Specification Summary & Compliance

This shoulder screw adheres to ISO 7379 specifications, with a thread size of M3x0.5 and Class 5g6g thread fit for standard metric coarse threading. The shoulder diameter tolerance is -0.072 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring precise assembly. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing safety and environmental standards for industrial and consumer products.