S-91273A347 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or chemically exposed environments.
• Precise alignment and smooth rotation ensured by the 45mm shoulder with tight diameter tolerance for reduced wear.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under load.
• Secure, non-slip installation with a knurled head and 2mm hex socket drive for firm tool grip.
• Accurate and durable threading with Class 5g6g fit M3 x 0.5mm coarse pitch for easy assembly and vibration resistance.
• Consistent hardness and durability from Rockwell B55 rating, maintaining integrity through repeated use.
• Compliance with global standards including RoHS 3 and REACH, ensuring safe, eco-friendly use in regulated industries.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The 18-8 stainless steel material provides excellent resistance to rust and chemicals, making it suitable for applications in machinery, automotive assemblies, and electronic enclosures where exposure to moisture or harsh conditions is a concern. The 45mm shoulder length and precise diameter tolerance allow for accurate positioning of moving parts, reducing friction and extending component life. Combined with a hex socket drive and knurled head texture, it ensures secure fastening even in high-vibration environments. Its Class 5g6g thread fit and coarse pitch facilitate quick installation and reliable performance, supporting efficient maintenance and assembly processes in industrial shoulder screw applications.

Specification Summary & Compliance

This shoulder screw features a metric M3 x 0.5mm coarse pitch thread with Class 5g6g fit for precise tolerance, a shoulder diameter of 3 mm with tolerance from -0.04 to -0.01 mm, and shoulder length of 45 mm with tolerance 0 to 0.25 mm. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in various global markets.