Door Hardware 101: What Are the Parts Called

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When it comes to home improvement, understanding the intricacies of your door hardware can make all the difference. Whether you are replacing an old doorknob or upgrading your door lock, it’s in your best interests to know the terminology and functions of each component. In this guide, we will break down the specific parts of a doorknob and cover the most intricate parts of a door lock to help you make informed decisions for your home improvement projects.


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Understanding the Parts of a Door Knob

The specific parts of a doorknob are more numerous and complex than they might seem. Here are the key components:

  • Knob: This is the part you actually turn. It can be decorative or plain, depending on your preference.
  • Rose: The rose is the plate that sits flush against the door, covering the hole where the knob mechanism is housed.
  • Spindle: This is the bar that connects the two knobs on either side of the door.
  • Latch: The latch is the mechanism that extends into the door frame to keep the door closed.
  • Strike Plate: The strike plate is attached to the door frame and catches the latch when the door is closed.
  • Keyway: If your door knob has a lock, the keyway is where you insert the key.

Breaking Down the Parts of a Door Lock

Just like door knobs, door locks have several components that work together to secure your home. Here are the main parts of a door lock:

  • Deadbolt: A strong bolt that extends into the door frame, providing additional security.
  • Faceplate: The metal plate that surrounds the deadbolt and latch, providing a finished look.
  • Cylinder: The part of the lock where you insert the key. It contains pins that must be aligned with the key to unlock the door.
  • Thumb Turn: A knob on the inside of the door that allows you to lock and unlock the door without a key.
  • Strike Plate: Similar to the plate used for door knobs, this plate catches the deadbolt and latch.

Exploring Door Lock Parts in Detail

To help you further understand the complex parts of a door lock, let’s take a quick look at some additional details:

  • Mortise Lock: This type of lock is installed into a pocket cut into the door edge. It includes a lock body, a handle or knob, and a strike plate.
  • Keyed Cylinder: Found in both mortise and cylindrical locks, the keyed cylinder contains the pins and springs that align with the key to unlock the door.
  • Escutcheon: A decorative plate that surrounds the keyhole or keyway, providing an additional layer of protection and a more elegant appearance.

What Are the Parts of a Door Lock Called?

Understanding what the parts of a door lock are called can significantly simplify your home improvement projects. Once you know the terminology, you can have efficient conversations with door hardware professionals and make more informed choices when purchasing new hardware.

Common Issues with Door Lock Parts

Now that we have identified the various door lock parts, we’d like to highlight the most common issues that might arise:

  • Misalignment: If the strike plate and latch or deadbolt are not properly aligned, you need be very careful, because the door may not lock securely. You should be on top of such situations and contact professionals as soon as possible.
  • Wear and Tear: Over time, the internal parts of a lock can wear down, making it difficult to lock or unlock the door.
  • Rust and Corrosion: Moisture can be the main cause of why some metal parts of a door lock rust, compromising the effectiveness of the lock and your own security.


Understanding the various parts of a door knob and the intricate parts of a door lock is crucial for any home improvement project involving door hardware. You just never know when the information will come in handy, but you’ll be glad to have it just in case. It’s best to stay prepared. By familiarizing yourself with these components, you can make informed decisions, troubleshoot common issues, and enhance the security and functionality of your home.

If you’re looking for high-quality and reliable Park City door hardware, visit Alpine Door Hardware and experience how swiftly we handle your home renovation project or security upgrade. Contact us today and keep those doors safe!

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