I reassembled a Mac Pro A1186 and have extra parts left over. What do they go to?

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I disassembled a Mac Pro A1186 for cleaning and upon reassembly found that I have several screws and what appear to be some kind of nuts. I don't remember what they go to.
This system did not have any hard disks. I did not remove the only optical drive. Everything else was removed for cleaning including the motherboard.
I did not encounter any other similar screws during reassembly. It is therefore presumed that they are totally unique for their purpose.
The nuts are also unique and I'd have thought obvious enough considering their size and number to be remembered. But I can't find a place for them.
What do these parts go to?

For your personal entertainment I must also mention that that, although I am an experienced PC user, this is my very first Mac. It is very embarrassing for me to have reassembled a computer and not only have parts left over but have to ask someone else where they go.
For a while during disassembly I kept thinking how nice and obviously thought out everything was. But then all of the different parts and pieces started piling up and I knew that I was in trouble. And, well, here we are!
Answered:
As Tetsujin answerer already, the nuts are part of the locking mechanism that s initiated by a level at the back of the case. I had removed these while trying to figure out how to extract the power supply.

The other two screws, which I found to be identical to the ones which secure the 5.25â drives, secure the cage around the memory boards and secure it to the bottom of the case.

mac mac-pro repair case
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Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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up vote
2
down vote
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I disassembled a Mac Pro A1186 for cleaning and upon reassembly found that I have several screws and what appear to be some kind of nuts. I don't remember what they go to.
This system did not have any hard disks. I did not remove the only optical drive. Everything else was removed for cleaning including the motherboard.
I did not encounter any other similar screws during reassembly. It is therefore presumed that they are totally unique for their purpose.
The nuts are also unique and I'd have thought obvious enough considering their size and number to be remembered. But I can't find a place for them.
What do these parts go to?

For your personal entertainment I must also mention that that, although I am an experienced PC user, this is my very first Mac. It is very embarrassing for me to have reassembled a computer and not only have parts left over but have to ask someone else where they go.
For a while during disassembly I kept thinking how nice and obviously thought out everything was. But then all of the different parts and pieces started piling up and I knew that I was in trouble. And, well, here we are!
Answered:
As Tetsujin answerer already, the nuts are part of the locking mechanism that s initiated by a level at the back of the case. I had removed these while trying to figure out how to extract the power supply.

The other two screws, which I found to be identical to the ones which secure the 5.25â drives, secure the cage around the memory boards and secure it to the bottom of the case.

mac mac-pro repair case
New contributor
Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
those look like spacers to me, not nuts.
â BuscarìÂÂ
6 hours ago
Yeah spacers, which may be bad. Something might be too close to something else, potentially crushing it or shorting it out. Not good.
â l008com
5 hours ago
I've never had the mobo out of a Pro, so idk about the spacers, but the 2 thread-locked screws look like they come from the underside of the drive slide/PSU - those screws don't form a 'square' so might be easy to miss.
â Tetsujin
3 hours ago
add a comment |Â
up vote
2
down vote
favorite
up vote
2
down vote
favorite
I disassembled a Mac Pro A1186 for cleaning and upon reassembly found that I have several screws and what appear to be some kind of nuts. I don't remember what they go to.
This system did not have any hard disks. I did not remove the only optical drive. Everything else was removed for cleaning including the motherboard.
I did not encounter any other similar screws during reassembly. It is therefore presumed that they are totally unique for their purpose.
The nuts are also unique and I'd have thought obvious enough considering their size and number to be remembered. But I can't find a place for them.
What do these parts go to?

For your personal entertainment I must also mention that that, although I am an experienced PC user, this is my very first Mac. It is very embarrassing for me to have reassembled a computer and not only have parts left over but have to ask someone else where they go.
For a while during disassembly I kept thinking how nice and obviously thought out everything was. But then all of the different parts and pieces started piling up and I knew that I was in trouble. And, well, here we are!
Answered:
As Tetsujin answerer already, the nuts are part of the locking mechanism that s initiated by a level at the back of the case. I had removed these while trying to figure out how to extract the power supply.

The other two screws, which I found to be identical to the ones which secure the 5.25â drives, secure the cage around the memory boards and secure it to the bottom of the case.

mac mac-pro repair case
New contributor
Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I disassembled a Mac Pro A1186 for cleaning and upon reassembly found that I have several screws and what appear to be some kind of nuts. I don't remember what they go to.
This system did not have any hard disks. I did not remove the only optical drive. Everything else was removed for cleaning including the motherboard.
I did not encounter any other similar screws during reassembly. It is therefore presumed that they are totally unique for their purpose.
The nuts are also unique and I'd have thought obvious enough considering their size and number to be remembered. But I can't find a place for them.
What do these parts go to?

For your personal entertainment I must also mention that that, although I am an experienced PC user, this is my very first Mac. It is very embarrassing for me to have reassembled a computer and not only have parts left over but have to ask someone else where they go.
For a while during disassembly I kept thinking how nice and obviously thought out everything was. But then all of the different parts and pieces started piling up and I knew that I was in trouble. And, well, here we are!
Answered:
As Tetsujin answerer already, the nuts are part of the locking mechanism that s initiated by a level at the back of the case. I had removed these while trying to figure out how to extract the power supply.

The other two screws, which I found to be identical to the ones which secure the 5.25â drives, secure the cage around the memory boards and secure it to the bottom of the case.

mac mac-pro repair case
mac mac-pro repair case
New contributor
Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 1 hour ago
New contributor
Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 6 hours ago
Zhro
1163
1163
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Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Zhro is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
those look like spacers to me, not nuts.
â BuscarìÂÂ
6 hours ago
Yeah spacers, which may be bad. Something might be too close to something else, potentially crushing it or shorting it out. Not good.
â l008com
5 hours ago
I've never had the mobo out of a Pro, so idk about the spacers, but the 2 thread-locked screws look like they come from the underside of the drive slide/PSU - those screws don't form a 'square' so might be easy to miss.
â Tetsujin
3 hours ago
add a comment |Â
those look like spacers to me, not nuts.
â BuscarìÂÂ
6 hours ago
Yeah spacers, which may be bad. Something might be too close to something else, potentially crushing it or shorting it out. Not good.
â l008com
5 hours ago
I've never had the mobo out of a Pro, so idk about the spacers, but the 2 thread-locked screws look like they come from the underside of the drive slide/PSU - those screws don't form a 'square' so might be easy to miss.
â Tetsujin
3 hours ago
those look like spacers to me, not nuts.
â BuscarìÂÂ
6 hours ago
those look like spacers to me, not nuts.
â BuscarìÂÂ
6 hours ago
Yeah spacers, which may be bad. Something might be too close to something else, potentially crushing it or shorting it out. Not good.
â l008com
5 hours ago
Yeah spacers, which may be bad. Something might be too close to something else, potentially crushing it or shorting it out. Not good.
â l008com
5 hours ago
I've never had the mobo out of a Pro, so idk about the spacers, but the 2 thread-locked screws look like they come from the underside of the drive slide/PSU - those screws don't form a 'square' so might be easy to miss.
â Tetsujin
3 hours ago
I've never had the mobo out of a Pro, so idk about the spacers, but the 2 thread-locked screws look like they come from the underside of the drive slide/PSU - those screws don't form a 'square' so might be easy to miss.
â Tetsujin
3 hours ago
add a comment |Â
1 Answer
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I'm posting this as a pure guess, just so I can add a picture...
The underside of the drive bay has a lot of screws like that & also the pic shows one of many areas, the PSU housing, that uses those 'spacers' as sliding locks - just in case they're not actually spacers.
Pic updated - red circled area is what I meant - drive locks perhaps [I've 3 different Pros here, but all are in use so I can't take them apart to check ;)
I've never taken the mobo out of a Mac Pro, so never seen underneath to know what the spacers may look like.

From what I recall, the circled ones are pan-heads for the PSU, the others are button-heads, like your picture.
The power supply doesn't slide into place on spacers. It slides into place and is then secured directly by those five screws. A good guess and I'd thought they went on the reverse side as well.
â Zhro
2 hours ago
The locks I meant may be the drive locks There are a lot of bits in a Pro that have that kind of slide-lock, but iirc, most don't have a hole through the middle. Pic updated & circled. Can't take one apart right now, all are in use.
â Tetsujin
1 hour ago
That's it! I had removed these while trying to figure out how to remove the power supply.
â Zhro
1 hour ago
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
I'm posting this as a pure guess, just so I can add a picture...
The underside of the drive bay has a lot of screws like that & also the pic shows one of many areas, the PSU housing, that uses those 'spacers' as sliding locks - just in case they're not actually spacers.
Pic updated - red circled area is what I meant - drive locks perhaps [I've 3 different Pros here, but all are in use so I can't take them apart to check ;)
I've never taken the mobo out of a Mac Pro, so never seen underneath to know what the spacers may look like.

From what I recall, the circled ones are pan-heads for the PSU, the others are button-heads, like your picture.
The power supply doesn't slide into place on spacers. It slides into place and is then secured directly by those five screws. A good guess and I'd thought they went on the reverse side as well.
â Zhro
2 hours ago
The locks I meant may be the drive locks There are a lot of bits in a Pro that have that kind of slide-lock, but iirc, most don't have a hole through the middle. Pic updated & circled. Can't take one apart right now, all are in use.
â Tetsujin
1 hour ago
That's it! I had removed these while trying to figure out how to remove the power supply.
â Zhro
1 hour ago
add a comment |Â
up vote
3
down vote
accepted
I'm posting this as a pure guess, just so I can add a picture...
The underside of the drive bay has a lot of screws like that & also the pic shows one of many areas, the PSU housing, that uses those 'spacers' as sliding locks - just in case they're not actually spacers.
Pic updated - red circled area is what I meant - drive locks perhaps [I've 3 different Pros here, but all are in use so I can't take them apart to check ;)
I've never taken the mobo out of a Mac Pro, so never seen underneath to know what the spacers may look like.

From what I recall, the circled ones are pan-heads for the PSU, the others are button-heads, like your picture.
The power supply doesn't slide into place on spacers. It slides into place and is then secured directly by those five screws. A good guess and I'd thought they went on the reverse side as well.
â Zhro
2 hours ago
The locks I meant may be the drive locks There are a lot of bits in a Pro that have that kind of slide-lock, but iirc, most don't have a hole through the middle. Pic updated & circled. Can't take one apart right now, all are in use.
â Tetsujin
1 hour ago
That's it! I had removed these while trying to figure out how to remove the power supply.
â Zhro
1 hour ago
add a comment |Â
up vote
3
down vote
accepted
up vote
3
down vote
accepted
I'm posting this as a pure guess, just so I can add a picture...
The underside of the drive bay has a lot of screws like that & also the pic shows one of many areas, the PSU housing, that uses those 'spacers' as sliding locks - just in case they're not actually spacers.
Pic updated - red circled area is what I meant - drive locks perhaps [I've 3 different Pros here, but all are in use so I can't take them apart to check ;)
I've never taken the mobo out of a Mac Pro, so never seen underneath to know what the spacers may look like.

From what I recall, the circled ones are pan-heads for the PSU, the others are button-heads, like your picture.
I'm posting this as a pure guess, just so I can add a picture...
The underside of the drive bay has a lot of screws like that & also the pic shows one of many areas, the PSU housing, that uses those 'spacers' as sliding locks - just in case they're not actually spacers.
Pic updated - red circled area is what I meant - drive locks perhaps [I've 3 different Pros here, but all are in use so I can't take them apart to check ;)
I've never taken the mobo out of a Mac Pro, so never seen underneath to know what the spacers may look like.

From what I recall, the circled ones are pan-heads for the PSU, the others are button-heads, like your picture.
edited 2 hours ago
answered 3 hours ago
Tetsujin
54.9k1584172
54.9k1584172
The power supply doesn't slide into place on spacers. It slides into place and is then secured directly by those five screws. A good guess and I'd thought they went on the reverse side as well.
â Zhro
2 hours ago
The locks I meant may be the drive locks There are a lot of bits in a Pro that have that kind of slide-lock, but iirc, most don't have a hole through the middle. Pic updated & circled. Can't take one apart right now, all are in use.
â Tetsujin
1 hour ago
That's it! I had removed these while trying to figure out how to remove the power supply.
â Zhro
1 hour ago
add a comment |Â
The power supply doesn't slide into place on spacers. It slides into place and is then secured directly by those five screws. A good guess and I'd thought they went on the reverse side as well.
â Zhro
2 hours ago
The locks I meant may be the drive locks There are a lot of bits in a Pro that have that kind of slide-lock, but iirc, most don't have a hole through the middle. Pic updated & circled. Can't take one apart right now, all are in use.
â Tetsujin
1 hour ago
That's it! I had removed these while trying to figure out how to remove the power supply.
â Zhro
1 hour ago
The power supply doesn't slide into place on spacers. It slides into place and is then secured directly by those five screws. A good guess and I'd thought they went on the reverse side as well.
â Zhro
2 hours ago
The power supply doesn't slide into place on spacers. It slides into place and is then secured directly by those five screws. A good guess and I'd thought they went on the reverse side as well.
â Zhro
2 hours ago
The locks I meant may be the drive locks There are a lot of bits in a Pro that have that kind of slide-lock, but iirc, most don't have a hole through the middle. Pic updated & circled. Can't take one apart right now, all are in use.
â Tetsujin
1 hour ago
The locks I meant may be the drive locks There are a lot of bits in a Pro that have that kind of slide-lock, but iirc, most don't have a hole through the middle. Pic updated & circled. Can't take one apart right now, all are in use.
â Tetsujin
1 hour ago
That's it! I had removed these while trying to figure out how to remove the power supply.
â Zhro
1 hour ago
That's it! I had removed these while trying to figure out how to remove the power supply.
â Zhro
1 hour ago
add a comment |Â
Zhro is a new contributor. Be nice, and check out our Code of Conduct.
Zhro is a new contributor. Be nice, and check out our Code of Conduct.
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those look like spacers to me, not nuts.
â BuscarìÂÂ
6 hours ago
Yeah spacers, which may be bad. Something might be too close to something else, potentially crushing it or shorting it out. Not good.
â l008com
5 hours ago
I've never had the mobo out of a Pro, so idk about the spacers, but the 2 thread-locked screws look like they come from the underside of the drive slide/PSU - those screws don't form a 'square' so might be easy to miss.
â Tetsujin
3 hours ago