4-11/16” square, 1/2" raised 30-50 amp receptacle, 2.441" diameter industrial surface covers with included screws and nuts are used to attach a 30-50 amp receptacle, 2.625" diameter device directly onto 4-11/16" 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 lockwasher.