The ornamental design for a captivescrew, as shown and described.
FIG. 1 is a side perspective view for a first embodiment of a captive screw with a knurled screw cap in a non-fastened position, with all remaining sides being identical with the exception of the spring, and a driver recess shown in dashed lines.
FIG. 2 is a side perspective view for the first embodiment thereof, shown in a fastened position.
FIG. 3 is a side perspective view for a second embodiment of a captive screw with a smooth, non-knurled screw cap in a non-fastened position, with all remaining sides being identical with the exception of the spring, and a driver recess shown in dashed lines; and,
FIG. 4 is a side perspective view for the second embodiment thereof, shown in a fastened position.
The broken lines represent portions of the article and form no part of the claimed design.