The cable mount D-sub connector kits come with everything needed but the wire. The back shell, seal, thumbscrews and solder cup connector are all included. Simply fit the cable through the back shell, terminate the wire to the solder cup contacts and hand tighten the cable nut on the back of the back shell. The back shell will seal a particular range of cable diameters depending on the position count of the connector.  Please consult the datasheet for specific cable diameter ranges.