The ornamental design for a jackstabilizingplate, as shown and described.
FIG. 1 is a perspective view of a jack stabilizing plate showing our new design.
FIG. 2 is a front elevation view of the jack stabilizing plate illustrated in FIG. 1.
FIG. 3 is a rear elevation view of the jack stabilizing plate illustrated in FIG. 1.
FIG. 4 is a side elevation view of the jack stabilizing plate illustrated in FIG. 1.
FIG. 5 is another side elevation view of the jack stabilizing plate illustrated in FIG. 1.
FIG. 6 is top plan view of the jack stabilizing plate illustrated in FIG. 1.
FIG. 7 is bottom plan view of the jack stabilizing plate illustrated in FIG. 1.
FIG. 8 is another perspective view of the jack stabilizing plate illustrated in FIG. 1; and,
FIG. 9 is a perspective view of the jack stabilizing plate connected to a portion of a jack to be used in connection with a trailer.
The fasteners, trailer and jack shown in broken lines are for the purpose of illustrating environment and form no part of the claimed design. The circles shown in broken lines on the surface of the plate are for the purpose of illustrating portions of the jack stabilizing plate and form no part of the claim.