Hammond 1590xxfl series flanged lid diecast aluminium enclosures natural hammond 1590bb2fl the hammond ip54 diecast aluminium enclosure flanged lid 50 x 50 x 25mm is an aluminium enclosure with a flanged lid secured by 6 32 x frac12 inch machine screws into drilled countersunk and tapped holesthe lap joint construction is designed to meet ip54 and also provides improved emirfi shielding the flanged lid allows for easy wall or shelf mounting with added security as the lid screws are