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Kwikset 81640 - Strike Box
FEATURES
The Kwikset Deadbolt Strike Box is designed to be used with all Deadbolt Strike Plates. This is a plastic strike box and has break away tabs to accomodate all Kwikset Deadbolt Strike Plates.
MANUFACTURER:Kwikset Corporation
CATEGORY:Parts and Accessories
SUB CATEGORY:Strike Boxes
DIMENSIONS:3-19/32" Length x 1-3/32" Width
BASE METAL:Plastic
MOUNTING HARDWARE:N/A - Strike plate screws hold this strike box in place
COMPATABILITY:All Kwikset Single and Double Cylinder Deadbolts
All Kwikset Single and Double Cylinder Handlesets
AVAILABLE FINISHES:N/A - Strike Box goes behind Strike Plate
SHIPPING WEIGHT:.01 lbs
OPTIONAL STRIKE PLATES:83223 - Round Corner Heavy Duty
83222 - Square Corner Heavy Duty
85279 - Round Corner Medium Duty
85278 - Square Corner Medium Duty
85063 - Round Corner Light Duty
85072 - Square Corner Light Duty
85303 - Round Corner Full Lip
84632 - "T" Strike Plate
Helpful Hint:
- While installing strike boxes behind strike plates definitely provides additional security against forced entry and a cleaner more professional look, it will require additional installation time. More wood may need to be removed from the door jamb for proper installation.
- This strike box has break away tabs to allow it to fit all Kwikset Deadbolt Strike Plates
Manufacturer Resources
Product Specs
- Subcategory:
- Parts and Accessories
- Product Type:
- Strike Plates
- Product Group:
- Parts and Accessories
- Product Subgroup:
- Parts and Accessories
- Commercial/Residential:
- Residential
- Electronic:
- No
- Handle Type:
- Deadbolt
- Product Model:
- 81640
- Product Function:
- Deadbolt Strike Plate
- Product Substrate:
- Steel
- Product Category:
- Parts and Accessories
- Department:
- Door Hardware
Kwikset 81640 – Frequently Asked Questions
1) What is a Kwikset 81640 strike box and do I actually need one behind my deadbolt strike plate?
The Kwikset 81640 is the plastic box that sits in the jamb mortise behind a deadbolt strike plate, so the bolt throws into an enclosed pocket instead of bare wood. It adds resistance to forced entry and hides the rough cutout, which is why it looks cleaner on a finished jamb. Trade-off is install time: you often have to route more wood out of the jamb to seat the box properly, so plan for that on a retrofit.
2) How big is the Kwikset 81640 strike box, and how deep do I have to mortise the jamb?
The 81640 measures 3-19/32 x 1-3/32 inches, so your jamb cutout has to be at least that footprint before the box will drop in. Most existing deadbolt bores are a plain round hole, which means you will be squaring and enlarging the pocket to take the box. Cut it to the box, not to the strike plate.
3) Which Kwikset deadbolt strike plate should I order with the 81640 strike box?
Match the plate to the corner profile of your existing jamb mortise and the duty you need. Kwikset pairs the 81640 with the 83223 round corner heavy duty and 83222 square corner heavy duty, the 85279 round and 85278 square corner medium duty, the 85063 round and 85072 square corner light duty, the 85303 round corner full lip, and the 84632 T strike. Round corner plates drop into a routed mortise; square corner suits a chiseled one.
4) Is the Emtek 83223 deadbolt strike plate a substitute for the Kwikset 81640?
No - they are different parts that work together rather than replacing each other. The Kwikset 81640 is a plastic strike box, the recessed cup that sits inside the jamb mortise behind a strike plate. The Emtek 83223 is a standard deadbolt strike plate with square corners, the visible faceplate that screws to the jamb. A buyer replacing a damaged faceplate wants a strike plate; a buyer adding reinforcement behind an existing faceplate wants the strike box.
5) Does the Kwikset 81640 strike box come with screws?
No screws come with the 81640. It is held captive by the screws from the deadbolt strike plate that mounts over it, so you use the fasteners that came with your strike plate or lock. If you are chasing security rather than looks, use long screws through the plate into the framing behind the jamb.
6) What finish does the Kwikset 81640 strike box come in, and will it match my satin nickel hardware?
Finish is not a factor here. The 81640 is plastic and sits entirely behind the strike plate inside the jamb, so nothing of it shows once the plate is screwed on. Your visible finish comes from whichever Kwikset deadbolt strike plate you pair with it.
7) Is the Kwikset 81640 strike box rated for commercial doors or apartment entry doors?
Kwikset catalogs the 81640 as residential hardware, so it belongs on house and apartment entry doors, not on a Grade 1 commercial opening. For multi-family, it works fine on unit entry doors carrying Kwikset residential deadbolts; on a fire rated corridor or a commercial opening you want a steel commercial strike assembly instead.
8) I have an Emtek or Deltana deadbolt, not a Kwikset. Can I use this strike box?
The 81640 is cut for Kwikset deadbolt strike plates, and its break away tabs are sized to that family, so treat it as a Kwikset part. If you are on Emtek hardware, the Emtek 83223 standard deadbolt strike plate with square corners is the matching plate; on Deltana, the SP2753 deadbolt strike plate measures 2-3/4 x 1-1/4 inches in steel. Buying a box for a foreign plate usually means the plate screws will not land on the box tabs.
9) Will a Codelocks ASA strike plate work on a residential deadbolt opening?
The Codelocks ASA strike plate is an ASA-format strike in a stainless steel finish, a shape cut for ASA-prep jambs rather than the residential deadbolt prep the Kwikset 81640 strike box is built around. The 81640 is a residential part that fits all Kwikset single and double cylinder deadbolts and handlesets. If the jamb is ASA-prepped, the ASA strike is the right family; if it is a standard residential deadbolt bore, stay with the Kwikset deadbolt strike plates and the 81640 box behind them.
10) Does the deadbolt strike plate I buy have to be the same brand as the strike box?
The Kwikset 81640 strike box has break away tabs so it fits all Kwikset deadbolt strike plates, and it measures 3-19/32 inches long by 1-3/32 inches wide. Deadbolt faceplates from other makers exist in the same role - the Emtek 83223 square corner deadbolt strike plate and the Deltana SP2753 at 2-3/4 by 1-1/4 inches in steel - but the box has to sit inside the mortise your chosen faceplate covers, so check the faceplate opening against the 3-19/32 by 1-3/32 inch box footprint before mixing brands.
11) Kwikset 81640 vs Deltana SP2753 - which one goes in the jamb mortise?
Both are deadbolt strike components but they occupy different depths of the same opening. The Deltana SP2753 is a steel deadbolt strike plate at 2-3/4 inches by 1-1/4 inches, mounting flush on the face of the jamb. The Kwikset 81640 is the plastic strike box at 3-19/32 inches by 1-3/32 inches that recesses into the wood behind the plate, and installing it takes extra time since more wood may need to be removed from the jamb for a proper fit.
12) Can I standardize on one strike box across a whole building of Kwikset deadbolts?
Yes, and that is the practical case for it. One part number covers every Kwikset deadbolt strike plate because of the break away tabs, and it works behind single cylinder and double cylinder deadbolts and handlesets alike. So a property manager running mixed Kwikset hardware across units can stock the 81640 alone and still let each door keep whatever plate profile is already routed into its jamb.
How fast can I get the Kwikset 81640 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Kwikset 81640 come with a warranty?
Absolutely. The Kwikset 81640 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Kwikset 81640?
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