S-91273A826 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Superior wear and abrasion resistance from the black oxide finish, extending service life.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and stress.
• Precise alignment and smooth rotation provided by the 40mm shoulder with tight diameter tolerance.
• Secure, non-slip installation enabled by the knurled head and 4mm hex drive for firm tool grip.
• Accurate and durable thread engagement with Class 5g6g fit and coarse M8x1.25mm thread for robust assemblies.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance.

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 offers excellent resistance to corrosion and oxidation, while the black oxide finish enhances surface hardness and reduces galling. The 40mm shoulder length with precise tolerances provides a stable pivot or spacer, minimizing misalignment in machinery, automotive, and electronic assemblies. Combined with a knurled head and hex drive, it ensures secure fastening in high-vibration environments, reducing maintenance downtime and improving operational reliability.

Specification Summary & Compliance

This shoulder screw features M8x1.25mm coarse threads with Class 5g6g thread fit for consistent engagement. The shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring high dimensional accuracy. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable manufacturing practices.