TN 14838 Wire Disc Brush Retaining Spring for Tennant Floor Scrubbers. This is the "pinch" wire spring which is located on top of the disc brush drive gimbal or clutch plate. This spring holds the scrub brushes on to the drive hub attached to the scrub brush drive motor. Durable galvanized steel construction. Replaces Tennant 14838. Our Part Number TN 14838