from a polysulfone resin or a fiber or mineral reinforced polyamide or propylene resin suitable resins include zytel u00ae and minlon u00ae 10b40 nc010 nylon 66 resins reinforced with mineral and obtainable from dupont u00ae the above referenced handbook of plastics elastomers and composites may contain several alternative suitable materials for the present collet which would be identifiable by a person of ordinary skill in the art without undue experimentation in one embodiment the present collet withstands the conditions under which the astm test for fittings e g f877 01 is administered these conditions may include operability at 150 psi and 210 degrees fahrenheit for 720 hours or at 190 psi and 180 degrees fahrenheit for 1000 hours to the inventors 39 knowledge no collets other than those advantageously made from minlons have achieved the foregoing standard test the teeth in the collet may be fashioned from metals such as aluminum steel alloys stainless steel and the like the present o ring may be made from several thermopolymers such as those listed and described in the above referenced u201c handbook of plastics elastomers and composites u201d one suitable material is ethylene propylene diene terpolymer epdm which can be obtained from parker hannafin u00ae when used for connecting tubing to convey pressurized water embodiments of the present connector which operate satisfactorily under sustained pressures of 100 psi 6 8 bar and 180 degrees fahrenheit 82 degrees celsius.