end of the tubular segment 12 there is an arc indentation not numbered on the cylindrical outside wall of the tubular segment 12 in front of said tubular plug 14 the emerged section of the body member 11 is then threaded through a crimp ring 13 and pierces into the cladding layer not numbered and the sheath layer not numbered of a fiber cable 30 the crimp ring 13 is used to fixedly clip the fiber cable 30 and the tubular body 11 together and to achieve an appropriate tension between the fiber cable 30 and the connector 10 please note that the core 31 of the fiber cable 30 is exposed for an appropriate length so that it is extended out of the tubular plug 14 of the body member 11 the extraneous fiber core 31 outside the tubular plug 14 is cut and removed the fiber core 31 is then abraded so that its end surface is flush against the tubular plug 14 39 s back end at this point the installation of the connector 10 to the fiber cable 30 is completed please note that on the cylindrical outside wall of the tubular plug 14 as shown in fig3 there is a groove 15 along the axial direction of the connector 10 for preventing the connector 10 from rotation inside the coupler 20 in contrast to the conventional connectors having springs and other component inside and therefore having higher production cost and fiber cable installation difficulty the connector 10 of the present invention.