S-90265A312 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 washdown applications.
• Exceptional mechanical strength with a tensile strength of 70,000 psi and a hardness of Rockwell B83 for reliable performance under heavy loads.
• Precise alignment and smooth rotation ensured by the 70mm long, precision-machined shoulder with a controlled diameter tolerance.
• Secure and easy installation with a 5mm hex socket drive and a knurled head for improved grip and reduced tool slippage.
• Guaranteed interchangeability and fit with a Class 5g6g thread fit and compliance with the international ISO 7379 standard.
• High shear strength of 45,000 psi for enhanced joint integrity in dynamic or vibrating assemblies.
• Environmental and regulatory compliance with RoHS 3 and REACH, making it suitable for global markets and sensitive applications.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to solve critical alignment and pivot point challenges in demanding mechanical assemblies. The long, 70mm shoulder length acts as a precise datum for locating parts like gears, pulleys, and linkages, eliminating the need for separate bushings and reducing assembly complexity. Manufactured from 18-8 stainless steel, it provides excellent corrosion resistance, which is vital for food processing, packaging, and outdoor machinery exposed to moisture. The combination of a coarse thread pitch (1.25mm) and a hex socket drive allows for high clamp load retention and secure installation in high-vibration environments. Its high tensile and shear strength ensures long-term reliability in heavy-duty applications, from conveyor systems to robotic arms, maximizing equipment uptime and reducing maintenance cycles.

Specification Summary & Compliance

This precision shoulder screw features an M8x1.25 metric thread with a Class 5g6g thread fit for standard clearance. The shoulder diameter is 10 mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 70 mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy. It is manufactured in compliance with the ISO 7379 standard and is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.