What material is your part number 1604R02-2CQ2 made from?

1604R02-2CQ2 is made from cres, passivated, IVD-Alumium coated.  (housing and cage) , it is according standard EN6092-01V  

1604R02 dimensions material

you can have also: 1604R02-1 , housing = aluminium ; cage = cres, passivated according to standard ABS0368 1604R02-2CP, housing = cres passivated ; cage = cres passivated according to standard EN6092-01 1604R02-1VL = housing = Titanium, anodized (blue) ; cage = cres passivated. according to standard EN6092-02S there exists also 1604R02-3CP, however this part has other dimensions. we have in stock 1604R02-1 = ABS0368  ; this is the lightest version of this receptacle.