Kwikset 664-CONV-KIT Converts 663 Deadbolt to a 667 Deadbolt (Blank Plate Exterior)

The 664-CONV-KIT is the exterior plate that turns a Kwikset 663 single cylinder deadbolt into a 667. The 663 is a one sided deadbolt with a thumbturn inside and nothing on the outside face. Adding the 664 plate gives you a blank exterior plate, so the outside of the door reads as finished hardware with no keyway and no way to operate the bolt from outside. The bolt is still thrown and retracted only from the interior turn.

Yes. The 664 plate only works when the door is bored through. A 663 one sided deadbolt is often installed on a door that was bored from the inside face only, and in that case there is nothing on the outside for the plate to mount to. Confirm the cross bore goes through both faces before you order the plate.

No. The 664 is a blank plate, so the converted 667 has no exterior keyway and cannot be unlocked from outside. If you need key access from the exterior, you want a single cylinder deadbolt with an outside cylinder instead, not this retrofit plate. Egress matters too: with a blank outside plate, anyone outside the door depends on someone inside to release the bolt.

Residential. The 664 retrofit plate is a residential grade deadbolt accessory, so for apartment entry doors, single family rentals and interior residential openings it is the right part. On a commercial opening with a fire rated door or a graded lockset spec, this is not the hardware to reach for.

Not among the deadbolt accessories ZenSupply stocks alongside it. The 664 is model specific, matched to the Kwikset 663 body, so it is not interchangeable with other brands' retrofit trim. The nearby accessories serve different jobs entirely: a GMS KIT-PART04 collars kit and GMS SFIC housings are cylinder parts, and the Trimco 1268 anchor plate is a 3-1/2 inch diameter plate for a different purpose. For a one sided to blank plate conversion on a Kwikset 663, the 664 kit is the part.

That is exactly the case it covers. On doors already bored through, adding the 664 exterior plate to a 663 gives a clean satin chrome face outside with no hole and no cylinder, while the interior thumbturn keeps working the same way. Doors bored from one side only will not take it.

Satin chrome is the finish offered on the 664 retrofit plate. If the rest of the deadbolt trim on your doors is brass or nickel, the plate will not match, so plan on it reading as a chrome plate on the outside face.

A screwdriver is all it takes. The 664 plate installs in minutes, which makes it practical for a property manager converting several doors in a building in one pass rather than pulling in a locksmith for each one.