S-91273A824 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing replacement costs.
• Enhanced durability and strength with a tensile strength of 70,000 PSI and Rockwell B55 hardness, ensuring reliable performance under high-stress applications.
• Precise component alignment thanks to the 30mm shoulder with tight diameter tolerance, minimizing play and wear in assemblies.
• Secure and easy installation with a knurled socket head and 4mm hex drive, providing excellent grip and preventing tool slippage.
• Broad compatibility with Class 5g6g metric coarse threads (M8x1.25), ensuring a reliable fit in standard metric applications.
• Long-lasting surface protection from the black oxide finish, which adds an extra layer of corrosion resistance and a professional appearance.
• Compliance with global standards including RoHS 3 and REACH, making it suitable for use in regulated industries and international markets.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address common challenges in precision assemblies, such as misalignment and component wear. The 30mm shoulder length acts as a precise pivot or bearing surface, ensuring accurate positioning of parts like gears, pulleys, and linkages in machinery and automotive systems. Manufactured from 18-8 Stainless Steel with a black oxide finish, it offers excellent resistance to rust and corrosion, extending service life in demanding conditions. The knurled socket head and hex drive design facilitate secure tightening, even in confined spaces, reducing installation time and improving safety. Ideal for applications in robotics, conveyor systems, and industrial equipment, this fastener delivers reliable performance where dimensional accuracy and durability are critical.

Specification Summary & Compliance

This shoulder screw features M8x1.25 coarse metric threads with a Class 5g6g thread fit for standard tolerance applications. The shoulder diameter is tightly controlled with a tolerance of -0.04 to -0.01 mm, and the shoulder length has a tolerance of 0 to 0.25 mm, ensuring precise fits. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and suitable for global industrial use.