S-93856A243 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 long-term replacement costs.
• Precise component alignment and secure pivoting thanks to the precision-ground shoulder with a tight diameter tolerance of -0.072 to -0.01 mm.
• High-strength performance under load with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for reliable operation in demanding applications.
• Secure and non-slip installation enabled by the knurled socket head and 4 mm hex drive, preventing tool slippage and ensuring proper torque application.
• Excellent thread engagement and interchangeability due to the Class 5g6g thread fit and M8 x 1.25 mm coarse thread, facilitating faster assembly.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring the screw is safe for use in regulated markets and products.
• Versatile shoulder length selection from 4 mm to 49.75 mm to accommodate various assembly thicknesses and design requirements.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to solve critical alignment and wear issues in industrial applications. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for machinery, automotive assemblies, and electronic enclosures exposed to moisture or chemicals. The precision shoulder diameter acts as a built-in spacer or pivot point, eliminating the need for additional bushings and reducing assembly complexity. The coarse thread with a 1.25 mm pitch and Class 5g6g thread fit ensures rapid installation and reliable holding power, even in materials where fine threads might strip. Combined with the knurled socket head for a secure grip, this screw delivers consistent performance in high-vibration environments, reducing maintenance downtime and improving overall equipment reliability.

Specification Summary & Compliance

This metric shoulder screw features an M8 thread with a 1.25 mm coarse pitch and a Class 5g6g thread fit per ISO standards, ensuring dimensional accuracy and interchangeability. The shoulder diameter tolerance is tightly controlled from -0.072 to -0.01 mm, and the shoulder length tolerance is ±0.05 mm. The screw is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B55. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.