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Kwikset 81640-003 – Frequently Asked Questions
1) What does a plastic strike box like the Kwikset 81640-003 actually do in the door frame?
It lines the mortised bolt pocket behind the strike plate. The Kwikset 81640-003 is a plastic strike box that drops into the hole bored in the jamb so the deadbolt throws into a clean, contained cavity instead of raw wood and loose framing debris. It sits behind the strike plate, not in place of it, so you still need the strike plate itself on the face of the jamb.
2) Will the Kwikset 81640-003 strike box work with any Kwikset deadbolt strike, or only certain ones?
It is made to work across all Kwikset deadbolt strikes, which is why property managers ordering for mixed buildings can stock a single part number rather than matching a box to each deadbolt model. If your jamb is already mortised for a Kwikset deadbolt strike, this is the box that belongs in that pocket.
3) Does a deadbolt strike box come with the deadbolt, or do I have to order it separately?
The 81640-003 is sold as a standalone replacement part. Deadbolt sets ship with a strike box in the carton, but boxes get cracked on install, lost during a re-key, or left out when someone swaps a strike plate on an existing frame. That is when you order this one on its own.
4) Is a plastic strike box strong enough, or should I use a reinforced metal box on an exterior door?
The plastic box is a pocket liner, not a security component. It keeps the bolt cavity clean and square; it does not add kick resistance. Holding power on an exterior opening comes from the strike plate and the length of the screws driven through the jamb into the stud behind it. If you want reinforcement, that is a job for a heavy strike plate with long screws, not for the box.
5) Can I use a Kwikset deadbolt strike box on a commercial opening?
It is catalogued for commercial use as well as residential, so it is fair game on light commercial wood-frame openings running Kwikset deadbolts, such as multi-family unit entries and office suite doors. On hollow metal frames with factory deadbolt prep, the frame is already formed with its own bolt pocket and a plastic box is not part of that assembly.
How fast can I get the Kwikset 81640-003 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
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 81640-003 come with a warranty?
Absolutely. The Kwikset 81640-003 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 81640-003?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Kwikset 81640-003 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.