Patent attributes
Provided is a vehicle seat fastening structure that enables a reduced length of a bolt for fastening a movable rail and a cushion frame in a spaced-apart manner. The cushion frame includes a bottom wall extending in a seat-width direction and a seat front-rear direction. The nut includes a body having a cylindrical shape and configured to penetrate the bottom wall, a thread groove, and a flange portion projecting radially from the body. A length of the nut along a central axis thereof is greater than a separation distance between an upper surface of the movable rail and an upper surface of the bottom wall of the cushion frame in a state in which no impact is applied to the cushion frame. The flange portion is provided in an area of the nut at a distance from an insertion opening for the bolt greater than the separation distance.
