S-90278A545 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and long-term reliability.
• High-strength performance offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications.
• Precise alignment and secure fit due to the precisely machined shoulder with controlled diameter and length tolerances.
• Easy, secure installation with a 2 mm hex socket drive, minimizing tool slippage and ensuring consistent torque application.
• Reliable thread engagement with Class 6g thread fit and coarse M3 x 0.5 mm pitch for quick assembly and vibration resistance.
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards, ensuring safe use in various markets.
• Smooth, low-profile head design for flush mounting and reduced risk of snagging in machinery assemblies.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for applications in moist or chemically aggressive environments, such as food processing equipment, medical devices, and outdoor machinery. The precise shoulder fit ensures accurate component positioning, reducing wear and misalignment in rotating parts like bearings, pulleys, and gears. With a hex socket drive, it allows for high-torque installation in confined spaces, enhancing assembly efficiency. The combination of 70,000 psi tensile strength and Rockwell B55 hardness ensures durability under dynamic loads, while the metric thread with coarse pitch facilitates quick disassembly for maintenance. Ideal for use in automation, electronics, and precision engineering, this screw delivers reliable performance and extended service life.

Specification Summary & Compliance

This shoulder screw features a Class 6g thread fit per metric standards, ensuring precise thread engagement. The shoulder diameter tolerance is -0.025 to 0 mm, and shoulder length tolerance is 0 to 0.05 mm, providing high dimensional accuracy for stable assemblies. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility. Manufactured to meet industry standards for metric shoulder screws, it guarantees consistent quality and performance in professional applications.