S-91273A344 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh or humid environments without compromising integrity.
• Enhanced torque application and reduced slippage thanks to the hex socket drive and knurled head texture for secure fastening.
• Precise alignment and spacing with a 30mm shoulder length and tight tolerance, ensuring consistent performance in assemblies.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) for reliable load-bearing in demanding mechanical applications.
• Accurate thread engagement with Class 5g6g fit and M3 x 0.5mm coarse pitch, facilitating quick installation and vibration resistance.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Durable and long-lasting performance from Rockwell B55 hardness, reducing wear and maintenance needs over time.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered from 18-8 stainless steel to address common industrial challenges such as misalignment, corrosion, and mechanical stress. The 30mm shoulder length provides a stable bearing surface for precise component positioning in machinery, automation systems, and electronic enclosures, minimizing play and enhancing operational accuracy. With a hex socket drive and knurled head texture, it offers improved grip during installation, reducing the risk of tool slippage and damage in tight spaces. The Class 5g6g thread fit and coarse pitch ensure reliable fastening even under vibration, making it suitable for high-stress applications like robotics, automotive assemblies, and precision instruments. Its RoHS 3 and REACH compliance further supports use in environmentally conscious sectors, delivering both performance and regulatory peace of mind.

Specification Summary & Compliance

This shoulder screw features a metric M3 x 0.5mm thread with Class 5g6g tolerance for precise fit, a shoulder diameter of 3 mm with tolerance of -0.04 to -0.01 mm, and shoulder length of 30 mm with tolerance of 0 to 0.25 mm. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use.