Externally threaded fiber-reinforced plastic member and a method of producing the same

An externally threaded, fiber-reinforced plastic member comprising a shank having a thread integrally formed on the exterior surface of said shank,

• said shank and said thread each comprising a plurality of resin-impregnated yarn tapes or resin-impregnated yarn cloth slit tapes extending longitudinally of the shank, each of at least some of said tapes being cut out at its portions corresponding to spaces defined by the ridges of said thread, said yarn tapes being fabrics of yarn woven in the form of tapes, and said yarn cloth slit tapes being tapes prepared by cutting a fabric of yarn woven in the form of a cloth into a plurality of tapes,
• each resin-impregnated yarn tape or each resin-impregnated yarn cloth slit tape being composed of a thermo-hardened resin and an elongated woven fabric comprising a plurality of first strands arranged substantially in parallel and extending longitudinally of said shank and a plurality of said second strands arranged substantially in parallel and substantially in perpendicular relation to said first strands, said first strands and second strands respectively constituting the warps and the wefts of said woven fabric, each strand comprising a plurality of fiber filaments,
• said elongated woven fabric having a width, as measured between the warps respectively disposed at both outward ends of the widthwise length of the fabric, about 0.2 to about 3 times the maximum diameter of the threaded member,
• said thread having therewithin portions of the second strands, most of said portions being those strand portions which extend continuously from the shank into the thread and terminate within the thread,
• said strand portions which extend continuously from said shank into said thread and terminate within said thread existing continuously or discontinuously within said thread along the periphery of said thread corresponding to one pitch of the thread, provided that there is no portion within said thread in which said strand portion do not exist continuously over a length of 20% or more based on the peripheral length of said thread corresponding to one pitch of the thread.