1. AN INFLATOR PLUNGER ASSEMBLY COMPRISING A HOLLOW CYLINDRICAL PLUNGER ROD, A PLUG IN THE END OF SAID ROD, SAID PLUG BEING OF RESILIENTLY DEFORMABLE MATERIAL, SAID PLUG HAVING AN INTEGRAL RADIAL FLANGE OF A DIAMETER SUBSTANTIALLY GREATER THAN THAT OF SAID ROD, THE LOWER FACE OF SAID FLANGE BEING FLAT, A WASHER HAVING A FLAT UPPER FACE IN CONTACT WITH SAID LOWER FACE, A SELF TAPPING SCREW EXTENDING THROUGH SAID WASHER AND INTO SAID PLUG, THE END OF SAID ROD BEING IN CONTACT WITH THE UPPER FACE OF SAID FLANGE.