In a cabinet having vertically extending side members (5) forming part of a chassis of the cabinet, panel mounts (1), also to extend vertically in the cabinet and to have panels mounted thereupon, are mountable to the side members (5) by integral members (3) which extend parallel to the outer face of the panel mount (1) at a spacing from the outer face and in a direction perpendicular to the longitudinal extent of the panel mount (1), i.e., horizontally. The integral members (3) are engaged in respective apertures in the side members (5) or in braces (7) extending between the side members (5) followed by forward or rearward movement to effect securement, retaining means such as pins or studs then being inserted in aligned bores (8, 9) in the panel mounts (1) and side members (5) to prevent return movement.