Abstract: A two stage spring clip for moveably fastening a first substrate to a second substrate through an aperture. The clip is comprised of an insert nose portion with outwardly tapered legs to form a first retaining portion. The first retaining portion has a first retaining shoulder that extends at a first angle that is substantially perpendicular to a centerline. The outwardly extending legs extend from said first retaining shoulder to form a second retaining shoulder. The second retaining shoulder extends from said centerline at a second angle that is less than the angle of the first retaining shoulder. The legs are further equipped with stop flanges that extend from the outwardly extending legs at an angle that prevents the over insertion of the spring clip into an aperture by acting as a stop against the sides of said aperture. The outwardly extending legs terminate in opposed flanges and during deployment of an air bag side curtain.