Abstract: A screw plug having a multiple-thread configuration formed along a screw shaft, wherein the multiple-thread configuration is configured to reduce the number of revolutions required to set the screw plug into a pressure vessel for repair of a puncture therein. The screw plug may be combined with a sealing agent to improve the airtight seal created by the insertion and setting of the screw plug, which sealing agent is configured to bond with the pressure vessel, thus providing a more long-term repair. A screw plug having a thread configuration with a flat upper pressure surface is also disclosed.