A connector for attachment to an extending transformer stud. The connector includes an elongate central body having a central aperture and an opening at one end for insertable accommodation of the transformer stud. The central aperture accepts a single or more than one size stud without increasing the size and cost needed for two separate mounting holes. The connector according to the present invention accepts the pitch of at least two different size threads and with the typical setscrew locking arrangement, maintains thread engagement on one side of the stud, thus securing the stud. The connector according to the present invention further provides a connector threadform having a reduced threadform angle than the stud threadform to provide greater conductivity and reduced electrical resistance between the stud and connector at lower set screw torque settings.