Streamlight Locking Screw for Vantage Helmet Flashlight. The Streamlight 691325 is a spare Locking Screw for the Streamlight Vantage Helmet Light. We have a large catalog of Streamlight replacement parts on sale giving you the ability to replace almost any component on a Streamlight Flashlight - so you can keep your Streamlight Vantage Helmet Flashlight in service longer Features of Streamlight Locking Screw for Vantage Helmet Lamp: Replaces Locking Screw for Vantage Helmet Flashlight Package Contents: Streamlight Locking Screw for Vantage Helmet Light 691325 Streamlight Locking Screw for Vantage Helmet Flashlight 691325