A method for manufacturing housing or control-components parts of metal including the steps of: manufacturing a housing or control-component part (1, 3) as a forged or cast blank (4, 5), stamping a recess (6) in the blank for an indicator insert with a stamping die in a stamping device, thereby creating a protrusion (7) on a back wall surface (8) of the part in the stamping direction, constricting the recess (6) with peeled protrusions of the peripheral walls (9) defining the recess (6), injecting a transparent plastic (2) into the recess (6) and, if applicable, into a mold connected with the recess (6) for forming a collar (10) on a front wall surface (11) in the stamping direction, and ablating the back wall surface (8) and the protrusion (7) by a fixed thickness amount (12), which results in exposure of the recess (6) and of the transparent plastic (2).