This standard specifies dimensions and gauging system for external MORTORQ super bolt head spiral drive system1). 1) External MORTORQ? Super is the trade name of a product supplied by licensees of the Phillips Screw Company. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by ASD-STAN nor CEN of the product named. Equivalent products may be used if they can be shown to lead to the same results.