Answers.Body: <p>In my experience, the <a href="http://www.bricklink.com/catalogTree.asp?itemType=P" rel="nofollow noreferrer">Bricklink catalog</a> is the most complete parts list. It is organized in fairly logical tree by part type (brick, plate, wheels, slope, etc). Once you get familiar with it, you should be able to identify parts fairly quickly.</p>
  
  <p>If you take a look at the 2 parts that you mentioned in your example on Bricklink, you can clearly see the difference between them:</p>
  
  <p>3004:</p>
  
  <p><img src="https://i.sstatic.net/KeyRH.jpg" alt="3004"></p>
  
  <p>3004px3:</p>
  
  <p><img src="https://i.sstatic.net/wcj4Z.png" alt="3004px3"></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-09-03T13:34:45.627Z
Answers.LastActivityDate: 2017-11-02T16:20:29.330Z
Answers.LastEditDate: 2017-11-02T16:20:29.330Z
Answers.UserDisplayName: jncraton
Body: <p>I've found <a href="http://rebrickable.com/myparts" rel="nofollow noreferrer">http://rebrickable.com/myparts</a> linked in one of the answers here on this site and I'd like to list all of the parts I have at home (probably a thousand or two). The problem is, there is <strong>a lot</strong> of similar pieces on Rebrickable, including some which have "similar" in the thumbnail image, or have three zeros for <em>parts</em>, <em>sets</em> and <em>colors</em>.</p>
  
  <p>For example there is a 1x2 brick with no hole in it: <a href="http://rebrickable.com/parts/3004" rel="nofollow noreferrer">3004</a>. What is the difference between this and <a href="http://rebrickable.com/parts/3004px3" rel="nofollow noreferrer">3004px3</a>? Can I filter the useless bricks out? How can I find the version with circular hole in the middle used a lot in Technic?</p>
  
  <p>But the whole question boils down to: <strong>How to efficiently identify bricks and their names?</strong></p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2013-09-03T15:33:33.310Z
Comments.Text: @jncraton A straight duplicate I'd say. I wonder how I've missed that question.
Comments.UserDisplayName: Maurycy
Tags: <piece-information>
Title: How to efficiently identify Lego bricks and find their names?
UserDisplayName: Maurycy
ThreadText: # How to efficiently identify Lego bricks and find their names?
  
  (Asked by: username_0 on 2013-09-03)
  
  I've found <http://rebrickable.com/myparts> linked in one of the answers here on this site and I'd like to list all of the parts I have at home (probably a thousand or two). The problem is, there is **a lot** of similar pieces on Rebrickable, including some which have "similar" in the thumbnail image, or have three zeros for *parts*, *sets* and *colors*.
  
  For example there is a 1x2 brick with no hole in it: [3004](http://rebrickable.com/parts/3004). What is the difference between this and [3004px3](http://rebrickable.com/parts/3004px3)? Can I filter the useless bricks out? How can I find the version with circular hole in the middle used a lot in Technic?
  
  But the whole question boils down to: **How to efficiently identify bricks and their names?**
  
  **Tags:** piece-information
  > **Comments:**
  > **username_0**: @jncraton A straight duplicate I'd say. I wonder how I've missed that question.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2013-09-03. Score: 2 | Accepted answer
  
  In my experience, the [Bricklink catalog](http://www.bricklink.com/catalogTree.asp?itemType=P) is the most complete parts list. It is organized in fairly logical tree by part type (brick, plate, wheels, slope, etc). Once you get familiar with it, you should be able to identify parts fairly quickly.
  
  If you take a look at the 2 parts that you mentioned in your example on Bricklink, you can clearly see the difference between them:
  
  3004:
  
  ![3004](https://i.sstatic.net/KeyRH.jpg)
  
  3004px3:
  
  ![3004px3](https://i.sstatic.net/wcj4Z.png)
  
  
  ---
  
  