Fastener specification for EVs: WHAT ENGINEERS NEED TO KNOW

Breaking down the critical differences in fastener selection for EV platforms.

Specifying fasteners for an electric vehicle is a fundamentally different exercise compared to an ICE vehicle. For ICE vehicles, the main challenges - heat, vibration, and torque repeatability - are well understood, and the industry has decades of established solutions to draw from.

EVs introduce four additional constraints that change the equation entirely: high-voltage (isolation, low magnetic permeability, thermal-cycling resilience and gram-level weight targets. A mis-specified bolt at the battery, busbar, or inverter level can reduce efficiency, compromise safety or void certification. To get it right, there is a need to understand each constraint and the materials that can address it.