This M7 square chassis nut is used to mount parts to the chassis of a vehicle, specifically suitable for a classic small model. The square shape fits in recesses or sheet metal and prevents rotation when the bolt is tightened. The metric M7 thread matches common attachment points on the frame. The nut spreads the load over the contact surface, which supports stable fastening of body or mechanical components. This type is used during repair, maintenance or replacement of fixings on the underbody and structural frame, where reliable positioning and repeatable assembly are required.
