To fasten slide-in electronic equipment, 482.6 mm (19) installed equipment and blanking plates to profile rails. Used with profile plate thicknesses 0.8 – 2.0 mm. For narrow tolerances,captive nuts for profile plate thicknesses 1.2 – 1.5 mm should be used. Either with or without contacting the installed equipment with the 482.6 mm (19") profile/housing.