Lock Parts

Door Lock Parts and Terminology

When working with locks, it is essential to be familiar with the correct door parts terminology. In this guide, we cover all the important parts for door locks, so you know exactly what you need when you’re doing repairs or when you want to disassemble a lock (also known as gut a lock).

Parts of a Door and Door Lock

• Faceplate: Plate on the end side of the lock.
• Strike Plate: Plate where the latch and deadbolt engage.
• Latch: The bolt that is operated with the door handle. Can be manipulated with a flip card.
• Latch Spring: Ensures that the latch retracts.
• Knob Hole: The hole with the operating mechanism of the door handle.
• Deadbolt: The bolt that locks the door. Operated with the cylinder lock.
• Cylinder Fixing Screw: Screw that secures the cylinder lock.
• Cylinder Lock: The part where you insert the key.
• Lock Preparation: Distance between the core of the cylinder lock and the center point of the knob hole. Other names are PC size, BB size, or WC size.
• Backset: Distance between the faceplate and the core of the cylinder lock.
• Case Width: Width of the entire lock mechanism.
• Case Height: Height of the lock mechanism.
• Faceplate Length: Total length of the faceplate.

Specific Pin Types for Locks

Spool Pin

A spool pin is a security pin that resembles a spool of thread. This pin makes lockpicking more difficult by providing a false sense of unlocking. You often see this pin in Abus padlocks.

Serrated Pin

The serrated pin has serrated edges, making lockpicking more challenging. Due to these edges, it is difficult to feel when the pin is in the correct position. Make sure you have a good lockpick set for locks with these pins.

Standard Pin

The standard pin is the simplest pin you can use without extra security features. This pin is often combined with spool and serrated pins for optimal security.

Door Hardware Parts and Purchase Advice

In addition to the lock itself, there are other door hardware parts to consider when replacing or installing locks. Think of door handles, rosettes, and security hardware. Always make the right choice by considering both sides of the door.

How to Disassemble a Lock? (Gut a Lock)

Gut a lock means to disassemble a lock for maintenance or safety reasons. For this, you often need specific tools. If you do this carefully, you can easily replace pins such as spool pin, serrated pin, and standard pin.

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Tips for Installing Lock Parts

Always ensure that parts such as the latch and deadbolt move smoothly after you have installed them. Use the correct screws and tools to prevent damage to the lock.