Mounting frame and rail for electronics and instrumentation enclosure

A mounting frame for an electronics and instrumentation enclosure for supporting components and parts to be mounted into the electronics and instrumentation enclosure, the mounting frame comprising two elongated parallel supports that form two sides of the mounting frame and are interconnected by an elongated piece, and four elongated corner parts fastened to the ends of the elongated supports by a fastener so that each end is provided with one corner part and the corner parts are perpendicular to a plane defined by the elongated supports, the corner parts being positioned in relation to one another so that they are at the corners of a rectangle, which rectangle has been obtained by joining the corner parts with four straight lines, wherein

• the fastener comprises a locking tongue formed to the ends of the elongated supports, each opposite end of both elongated supports having a locking tongue formed as one piece with the elongated support and extending away at an angle of 70 to 100 degrees from the plane defined by the elongated supports;
• and a through-hole for mounting arranged to the corner part for receiving the locking tongue, the corner parts comprising a plural number of such mounting holes at a distance from one another in a longitudinal direction of the corner parts;
• the locking tongue is inside one mounting hole of said plurality of mounting holes substantially without clearance between the locking tongue and a wall defining said one mounting hole when the longitudinal direction of the corner part is perpendicular to the plane defined by the supports;
• and
• the locking tongue has a length that is greater than a height of said one mounting hole, said length being the height of the locking tongue when the locking tongue extends upward or being the length of the locking tongue when the locking tongue extends downward, and the locking tongue comprises a support surface directed towards the corner parts.