a receptacle via tube 15 this device makes use of technology described in u s provisional patent application no 39 s 60 659 213 60 659 217 and 60 659 226 which are incorporated herein by reference the preferred embodiment of the device is made up of the following basic components needle 10 secured to needle hub 50 and in fluid communication with tube 15 housing 20 has a generally cylindrical body 200 having distal end 205 and proximal end 210 distal end 205 has an opening 215 proximal end 210 has an opening 220 a passageway 236 extends between the openings in the proximal and distal ends passageway 236 is dimensioned such that shield assembly 110 fits axially in it and such that shield assembly 110 can slide axially along it housing 20 is provided with wings 225 and 230 which can bend upwards towards each other and towards fin 300 on actuator assembly 30 fillet 227 facilitates molding of wings 225 and 230 and housing 20 an identical fillet is provided to stabilize wing 230 wings 225 and 230 are provided with indentations 250 and 255 respectively these are shaped and dimensioned to accommodate fin 300 housing body 200 is provided with a slot 260 designed to accommodated key 190 on shield assembly 110 described below slot 260 extends from proximal end 210 where it is open towards distal end 205 of housing body 200 where it is closed slot 260 has a proximal end 265 and a distal end 270 needle hub 50 has a stepped distal end 550 forming a hollow open ended cylinder.