S-91273A817 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced durability and wear resistance from the black oxide finish, extending service life in demanding applications.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
• Precise alignment and reduced wear due to the 8mm shoulder diameter with tight tolerance (-0.04 to -0.01 mm).
• Easy installation and removal with a knurled socket head and 4 mm hex drive, minimizing tool slippage.
• Accurate and secure fastening ensured by the Class 5g6g thread fit and M8x1.25 coarse pitch for quick assembly.
• Compliance with environmental standards, including RoHS 3 and REACH, for safe and sustainable use.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address common industrial challenges such as misalignment, vibration loosening, and corrosion. Made from 18-8 stainless steel with a black oxide finish, it offers excellent resistance to rust and wear, making it suitable for machinery, automotive, and electronics assemblies. The knurled socket head and hex drive provide secure tool engagement, reducing installation time and improving safety. With a coarse thread pitch of 1.25mm and precise shoulder diameter, it ensures stable positioning in rotating parts and linkages, minimizing maintenance needs and enhancing operational reliability in high-stress environments.

Specification Summary & Compliance

This shoulder screw features a metric thread with M8x1.25 size and Class 5g6g thread fit for standard tolerance. The shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring precise engineering alignment. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial applications without hazardous substances.