Everyone who deal with PC and servers assembling knows how does the screw to connect HDD with chassis (tray) looks like.
But how to name it correctly? Is it M3.5 screw or what?
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[Grommet Screws](http://www8.hp.com/emea_middle_east/en/products/oas/product-detail.html?oid=12528005)? – Anubioz Dec 05 '17 at 15:09
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2https://en.wikipedia.org/wiki/Computer_case_screws – Sven Dec 05 '17 at 15:09
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There are different types. 2.5” SSD drives take a shorter screw. Some drive trays or chassis need a specific head type. – Zoredache Dec 05 '17 at 16:26
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3.5" HDDs use non-metric, UTS screws: #6-32 UNC. They have #6 diameter (.138") with 32 tpi (coarse) thread.
2.5" HDDs use metric M3 screws.
Zac67
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