S-91273A772 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced durability and wear resistance from the black oxide finish, extending service life.
• Secure, non-slip installation thanks to the knurled socket head and 2 mm hex drive for reliable torque application.
• High mechanical strength with 70,000 psi tensile and 35,000 psi minimum shear strength for demanding applications.
• Precise alignment and spacing ensured by the 5 mm shoulder length with tight tolerances (0 to 0.25 mm).
• Consistent thread performance with Class 5g6g fit and M3 x 0.5 mm coarse pitch for quick assembly.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and fastening challenges in industrial applications such as machinery, automotive assemblies, and precision equipment. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, while the black oxide finish reduces friction and enhances aesthetic appeal. The knurled socket head with a 2 mm hex drive ensures a firm grip, minimizing tool slippage during installation. With a 5 mm shoulder length and precise tolerances, it provides reliable positioning for rotating parts like gears and pulleys, reducing wear and maintenance needs. The coarse thread (0.5 mm pitch) and Class 5g6g fit facilitate quick, secure fastening in high-vibration environments, making it a versatile choice for engineers seeking durability and efficiency.

Specification Summary & Compliance

This shoulder screw features metric coarse threads (M3 x 0.5 mm) with a Class 5g6g thread fit for standard precision. The shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring consistent performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial use.