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October 13th, 2025 22:59
M.2 SSD mounting screw question
I know this desktop uses a different screw from that in Dell latitude laptop
what is the thread? Is there an industry standard? Is it same or different from Optiplex 7040 SFF?
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redxps630
9 Legend
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14.8K Posts
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October 16th, 2025 15:44
7040 SFF M.2 standoff uses M2x3 mm screw
MSI B350 tomahawk motherboard M.2 standoff:
it seems MSI used a non-standard size on this board. The screw included with the SSD (M2x3mm) doesn't fit in the stand-off, the screw seems too big.
I called MSI, they don't carry the part anymore but it's M1.6 instead of M2. That explains it.
(edited)
user_531946
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October 14th, 2025 17:53
Hello @redxps630
The M.2 SSD mounting screw in your desktop looks like a standard #4-40 UNC thread, common for desktops but different from the smaller M2 x 3mm screws often used in Dell Latitude laptops. The Optiplex 7040 SFF typically uses the same type as most desktops, so expect similar threading there. Always double-check size to avoid mismatches!