S-90782A123 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from the black oxide finish, extending service life in harsh industrial environments.
• Exceptional strength and durability provided by alloy steel construction with a Rockwell C32 hardness and 140,000 psi tensile strength.
• Precise alignment and secure positioning enabled by the 20mm shoulder with controlled tolerances, reducing component wear.
• Reliable, coarse-pitch M8x1.25 thread with Class 6g fit ensures easy assembly and vibration resistance in demanding applications.
• Secure, non-slip installation facilitated by the knurled socket head and 4mm hex drive, allowing for high torque application.
• Broad industrial compliance with RoHS 3 and REACH regulations, ensuring environmental and safety standards are met for global supply chains.
• Versatile metric design with a 13mm head diameter and standard socket profile for compatibility with common tools and fixtures.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and load-bearing challenges in machinery assembly. The alloy steel core and black oxide finish provide robust protection against corrosion and wear, making it ideal for automotive, aerospace, and heavy equipment applications where high tensile strength is non-negotiable. The 20mm shoulder length with precise diameter tolerance acts as a pivot or spacer, minimizing misalignment and shear stress on connected parts. Its coarse thread pitch and Class 6g thread fit ensure quick, secure fastening even in high-vibration settings, reducing maintenance downtime and enhancing operational reliability for industrial shoulder screw uses.

Specification Summary & Compliance

This shoulder screw features a Metric M8x1.25 coarse thread with a Class 6g tolerance for consistent fit. The shoulder diameter is 8 mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 20 mm with a 0 to 0.25 mm tolerance, ensuring precise engineering alignment. Manufactured from alloy steel and finished with black oxide, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for regulated industrial and export markets.