effect as cutting tip 42 in forming holes 60 and 64 in fig1 collar 50 is shown both in a phantom position prior to piercing and insertion and in its fully inserted position referring to fig1 only one hole 60 is formed and a different article such as a threaded nut 50 is inserted other articles may also be inserted such as pierce nuts and bushings still other articles may be inserted with generally cylindrical articles being preferred but not required one skilled in the art will recognize that the holes 60 and 64 need not be formed by a punch but may be formed by other suitable means such as drilling laser cutting or other known means the present invention may be employed with any known hydroforming technique and may be used equally with low pressure and high pressure hydroforming it will be understood that the particular means of hydroforming tubular member 40 is not important to the present invention and further that the tubular member need not be formed at all in the cavity but rather its initial shape may be maintained non cylindrical blanks may also be used it will be understood that while it is preferable to operatively associate the insertion of the article with the forming of the hole s in tube 40 that the insertion of the article need not be so associated and may be accomplished by other means for example means not shown may be provided in second passage 30 for inserting an article into one or more of holes 60 and 64 in tube 40 still other modifications may be apparent to.