Answers.Body: <p>Like @JohnnyB commented, this is the lower part of <a href="https://rebrickable.com/parts/76385/hinge-brick-1-x-2-locking-with-single-finger-on-top/" rel="nofollow noreferrer">76385 Hinge Brick 1 x 2 Locking with Single Finger On Top</a>: <a href="https://i.sstatic.net/VBgEG.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/VBgEG.jpg" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-09-06T06:52:39.877Z
Answers.Text: That's exactly what I commented already, 989 is one of the alternate part numbers.  I didn't see any evidence in the photo that it had been forced apart, and the scratches on the exposed surface suggest it's been this way for a long time.  What is your guess on how it came to be?
Answers.UserDisplayName: JohnnyB
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-09-06T07:25:03.083Z
Answers.Text: Either a manufacturing error, or breakage after purchase. The first is more probable though, as I imagine any force strong enough to break the "finger" would damage the base as well.
Answers.UserDisplayName: zovits
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-09-08T06:07:20.757Z
Answers.Text: @JohnnyB I'm terribly sorry for this misunderstanding. I researched and wrote my answer without reading your comment and later on was in a hurry so did not consider upvoting the comment. I'll try to rectify this as far as I can.
Answers.UserDisplayName: zovits
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-10-06T07:31:57.100Z
Answers.Text: is there a specific reason this is made out two parts?
Answers.UserDisplayName: htmlcoderexe
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-10-06T08:02:39.687Z
Answers.Text: @htmlcoderexe since the assembly of sub-parts is a complex and expensive operation, I assume the alternative was considered to be even more complex and expensive. A probable reason is the complexity of the mould halves, of which the side including the "finger" would have to have two moving sub-parts for forming the circular cavities on the sides. Forming the finger sub-part as a separate unit allows both sub-parts to be moulded by a simple two-part mould without any moving components. If it's still not clear, please ask a new question, so that pictures can be added to explain the process.
Answers.UserDisplayName: zovits
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-10-06T10:10:33.257Z
Answers.Text: @zovits I think I understand, the "finger" piece is molded "sideways" while the brick is molded "upright" and then they're combined?
Answers.UserDisplayName: htmlcoderexe
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-10-06T10:32:54.733Z
Answers.Text: @htmlcoderexe exactly, that's what I suspect. Note however, that I don't work for Lego, have no relevant experience in injection moulding, and can only speculate based on what I have read and watched about the topic.
Answers.UserDisplayName: zovits
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-10-06T11:59:17.353Z
Answers.Text: @zovits you think it would be a good question for this site to ask what you suggested initially? or did the topic more or less exhaust itself in the comments here?
Answers.UserDisplayName: htmlcoderexe
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-10-06T12:07:57.307Z
Answers.Text: @htmlcoderexe There is not much more that could be said about the topic, but as a top level Q&A it would be better manageable than a comment stream. IMO the question itself would be on topic, as we explicitly do allow questions about "The history of The LEGO Group or elements", even if such manufacturing practices and decisions are impossible to know with certainty for anyone not working for TLG and probably non-disclosable for anyone who does.
Answers.UserDisplayName: zovits
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-09-06T06:01:31.840Z
Answers.LastActivityDate: 2019-09-08T06:09:14.767Z
Answers.LastEditDate: 2019-09-08T06:09:14.767Z
Answers.UserDisplayName: zovits
Answers.Body: <p>Well, between my comment and zovits "seconding" the idea, I think it's safe to assume we've established what this part "was".  I did a lot of searching earlier online, looking through people's collections of non-production and prototype rare parts and couldn't find this "version" of the part.  So, whatever the story of how it came to be, I would certainly consider this to be a rare keepsake.  Here is a photo of the inside of these bricks with the square insert from the "finger" easily identifiable.  </p>
  
  <p><a href="https://i.sstatic.net/CGeSc.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/CGeSc.jpg" alt="enter image description here"></a>  </p>
  
  <p>I couldn't bring myself to attempt a disassembly since I apparently don't have many of these and they aren't the more common color of Black and Dark Gray.  Perhaps Rin Rio-Oki will happen upon this question and take the initiative of dissecting one?  Fingers crossed ;)        </p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-09-06T15:41:01.783Z
Answers.LastActivityDate: 2019-09-06T15:53:49.213Z
Answers.LastEditDate: 2019-09-06T15:53:49.213Z
Answers.UserDisplayName: JohnnyB
Body: <p>Hoping somebody can help identify this part. It's a 1 x 2 brick, but has a square hole on one side.  Many a part has got me stuck, but rebrickable has helped me many times.   Can't seem to find this one. </p>
  
  <p><a href="https://i.sstatic.net/TJ3Z6.jpg" rel="noreferrer"><img src="https://i.sstatic.net/TJ3Z6.jpg" alt="enter image description here"></a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-09-06T03:22:14.033Z
Comments.Text: I've never seen a brick like this, very interesting! I am wondering if it might be a non-production prototype piece.  The bricks' profile looks exactly like brick# 989, but missing the "finger top" of course.
Comments.UserDisplayName: JohnnyB
Tags: <part-identification>
Title: 1 x 2 brick with square hole on top identification
UserDisplayName: coredumpninja
ThreadText: # 1 x 2 brick with square hole on top identification
  
  (Asked by: username_0 on 2019-09-06)
  
  Hoping somebody can help identify this part. It's a 1 x 2 brick, but has a square hole on one side. Many a part has got me stuck, but rebrickable has helped me many times. Can't seem to find this one.
  
  [![enter image description here](https://i.sstatic.net/TJ3Z6.jpg)](https://i.sstatic.net/TJ3Z6.jpg)
  
  **Tags:** part-identification
  
  > **Comments:**
  > **username_1**: I've never seen a brick like this, very interesting! I am wondering if it might be a non-production prototype piece.  The bricks' profile looks exactly like brick# 989, but missing the "finger top" of course.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2019-09-06. Score: 3 | Accepted answer
  
  Like @username_1 commented, this is the lower part of [76385 Hinge Brick 1 x 2 Locking with Single Finger On Top](https://rebrickable.com/parts/76385/hinge-brick-1-x-2-locking-with-single-finger-on-top/): [![enter image description here](https://i.sstatic.net/VBgEG.jpg)](https://i.sstatic.net/VBgEG.jpg)
  
  > **Comments:**
  > **username_1**: That's exactly what I commented already, 989 is one of the alternate part numbers.  I didn't see any evidence in the photo that it had been forced apart, and the scratches on the exposed surface suggest it's been this way for a long time.  What is your guess on how it came to be?  
  > **username_2**: Either a manufacturing error, or breakage after purchase. The first is more probable though, as I imagine any force strong enough to break the "finger" would damage the base as well.  
  > **username_2**: @username_1 I'm terribly sorry for this misunderstanding. I researched and wrote my answer without reading your comment and later on was in a hurry so did not consider upvoting the comment. I'll try to rectify this as far as I can.  
  > **username_3**: is there a specific reason this is made out two parts?  
  > **username_2**: @username_3 since the assembly of sub-parts is a complex and expensive operation, I assume the alternative was considered to be even more complex and expensive. A probable reason is the complexity of the mould halves, of which the side including the "finger" would have to have two moving sub-parts for forming the circular cavities on the sides. Forming the finger sub-part as a separate unit allows both sub-parts to be moulded by a simple two-part mould without any moving components. If it's still not clear, please ask a new question, so that pictures can be added to explain the process.  
  > **username_3**: @username_2 I think I understand, the "finger" piece is molded "sideways" while the brick is molded "upright" and then they're combined?  
  > **username_2**: @username_3 exactly, that's what I suspect. Note however, that I don't work for Lego, have no relevant experience in injection moulding, and can only speculate based on what I have read and watched about the topic.  
  > **username_3**: @username_2 you think it would be a good question for this site to ask what you suggested initially? or did the topic more or less exhaust itself in the comments here?  
  > **username_2**: @username_3 There is not much more that could be said about the topic, but as a top level Q&A it would be better manageable than a comment stream. IMO the question itself would be on topic, as we explicitly do allow questions about "The history of The LEGO Group or elements", even if such manufacturing practices and decisions are impossible to know with certainty for anyone not working for TLG and probably non-disclosable for anyone who does.  
  
  ---
  
  ### Answer by username_1 on 2019-09-06. Score: 3
  
  Well, between my comment and username_2 "seconding" the idea, I think it's safe to assume we've established what this part "was". I did a lot of searching earlier online, looking through people's collections of non-production and prototype rare parts and couldn't find this "version" of the part. So, whatever the story of how it came to be, I would certainly consider this to be a rare keepsake. Here is a photo of the inside of these bricks with the square insert from the "finger" easily identifiable.
  
  [![enter image description here](https://i.sstatic.net/CGeSc.jpg)](https://i.sstatic.net/CGeSc.jpg)
  
  I couldn't bring myself to attempt a disassembly since I apparently don't have many of these and they aren't the more common color of Black and Dark Gray. Perhaps Rin Rio-Oki will happen upon this question and take the initiative of dissecting one? Fingers crossed ;)
  
  
  ---
  
  