the step 306 a vent portion is being formed with a first section of a first thickness and a second section of a second thickness by forming the first thickness thinner than the second thickness after the first section is formed a needle is used to penetrate the first section to form a hole at the central axis as shown in the step 308 of fig6 the method 300 as set forth in claim 6 including the step 310 of forming an annular inclined wall of the elastomeric plug that extends from the first section to the second section thereby diverging from the first section to the second section the method 300 further includes the step 312 of forming an inner wall of the elastomeric plug having a diameter that is wider than the diameter of the second section the elastic plug can be formed by injection molding process but other fabrication processes can be used without limiting the scope of the present invention the elastic plus is formed from polymeric and elastic materials without limiting the scope of the present invention it will thus be seen that the present invention provides a novel hubcap assembly and method for making the same having a number of novel advantages and characteristics including those referred to specifically herein and others which are inherent in the invention a preferred form of hubcap and method of making it having been described in detail it is anticipated that the variations in the described form of construction and.