PURPOSE: To obtain a high degree of parallelization with respect to the face of a cathode-ray tube when a television receiver is incorporated, by forming a female screw part in a through hole provided on the clamping lug to have the television receiver incorporated, engaging said female screw part with a hollow cylindrical screw, and providing a flat positioning reference face at the forward tip of this screw in front of the face of the cathode-ray tube.

CONSTITUTION: By using a reference jig 30 having 2 reference faces which are formed at a high degree of parallelization, in the state where upper face 1a is closely stuck onto the reference face of the plateau-like projected part on the central part of said jig 30; screws 20 are inserted into the female parts 10a of clamping lugs at 4 places; while turning said screws, they are screwed in said female screws 20 by means of a rotary jig fitted to an adjustment groove 20c, and not shown in the figure. The reference face 20b for locating each screw 20 comes respectively in contact with the peripheral reference face of said jig 30, just then a lock nut 40 is inserted to be fit and fixed. Consequently, even if a deposition-fixed position itself to the metal shield-securing band 3 of each clamping lug 10 has some dispersion toward the tube body, the axial distance l up to the reference face 20b for locating the position can be made to completely coincide with the upper face 1a.