4-11/16 in square, 1/2 in raised 30-50 amp receptacle, 2.141 in diameter industrial surface covers with included screws and nuts are used to attach 30-50 amp receptacle, 2.141 in device directly onto 4-11/16 in square boxes in an industrial setting. They are also used when boxes are surface mounted or positioned in exposed work applications. These covers allow for a quick installation of devices and switches on steel covers before they are mounted onto a box. There is no bonding jumper required on covers with crushed corners, covers that have two or more device attachments (attachment screws included), or devices installed with the included lock washer. Cover, 2.142 in Diameter, 4-11/16 in Length, 4-11/16 in Width, 1/2 in Depth, Square Shape, 30 to 50 A Round Receptacle Cover, Surface Mounting, Steel, G60 Galvanized Used when boxes are surface mounted or positioned in exposed work applications Allow for a quick installation of devices and switches on steel covers before they are mounted onto a box No bonding jumper required on covers with crushed corners covers that have two or more device attachments Finish : G60 Galvanized Mounting Type : Surface Shape : Square Diameter : 2.142 in Length : 4-11/16 in Width : 4-11/16 in Depth : 1/2 in Cover Type : 30 to 50 A Round Receptacle Material : Steel