S-90265A309 M8 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and reducing replacement frequency.
• Exceptional mechanical strength offering 70,000 psi tensile and 45,000 psi shear strength for reliable performance under high-stress conditions.
• Precise alignment and smooth rotation ensured by the 55mm shoulder with tight diameter and length tolerances for reduced assembly wear.
• Secure, non-slip fastening provided by the knurled head and 5mm hex socket drive, allowing for high-torque installation without stripping.
• Wide compatibility and easy assembly with M8x1.25mm coarse Class 5g6g threads, conforming to common metric standards for streamlined sourcing.
• Long-term operational reliability backed by Rockwell B83 hardness, resisting deformation and maintaining clamp load over time.
• Compliance with global standards including ISO 7379, RoHS 3, and REACH, ensuring product safety and environmental responsibility.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for machinery exposed to moisture, chemicals, or outdoor conditions. The 55mm shoulder length with precise tolerances acts as a pivot, bearing surface, or locator, minimizing wear on connected components and ensuring accurate positioning in assemblies like rotating shafts, linkages, and jigs. The knurled head and hex socket drive facilitate secure handling and high-torque installation, reducing the risk of slippage during maintenance. By integrating a Class 5g6g thread fit and coarse thread pitch, it enables quick assembly and disassembly, enhancing productivity in automated equipment, conveyor systems, and precision instruments where reliability and repeatability are paramount.

Specification Summary & Compliance

This shoulder screw features an M8x1.25mm coarse thread with Class 5g6g tolerance for consistent fit. The shoulder diameter is 10 mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 55 mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy. It is manufactured in compliance with ISO 7379 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, confirming its suitability for global markets and restricted substance regulations.