AN IMPROVED THREADED FILAMENT WOUND PIPE AND THE METHOD OF MANUFACTURE THEREOF. THE IMPROVEMENT COMPRISES HELICALLY WINDING RESIN IMPREGNATED FIBERGLASS FILAMENTS UPON A MANDREL KNURLED AT THE ENDS IN THE FORM OF HELICAL THREADS. THE HELICAL WINDING PITCH IS GREATER THAN THE THREAD PITCH. AS A RESULT, THE FIBERGLASS FILAMENTS ALTERNATELY DEVIATE IN RADIAL DISPOSITION WITH RESPECT TO THE PIPE AXIS, THEREBY FORMING BOTH INTERIOR AND EXTERIOR PIPE THREADS AT THE ENDS OF THE FINISHED PIPE.