What in millimeters is the pin pitch for a 14-1 aka TPM-M connector?

Without disassembling enough of my two running self-built desktop PCs to be able to measure them in millimeters, I'm trying to find out the spacing of the pins on the standard TPM-M (also called 14-1 because one pin is blocked) motherboard connector. It's likely either 2.54mm, 2.0mm, or 1.27mm - I think. I have no discrete TPM modules, connected or unconnected, to take measurements from instead.

I've tried Googling but I haven't had any 100% positive luck. The closest I found is the top search result from this Google search, which when followed leads here, at which the top result is for 2.54mm Pin header Double Row Pin Header Right Angle S.M.T Type, however, the second Google search result leads here (same site) on which the second item listed is 1.27 Pitch Dual Rows Pin Header - H1.0 Right angle type pin header connector - P/N.Y01410-12R-RA-XP.

I'm not trying to buy any of these items - I'm trying to find the correct pitch in order to either buy or build the correct short extension cable since I have an obtrusive card in the PCIe slot which would likely interfere with using a discreet TPM module and moving the card to another position isn't an option. This particular desktop doesn't have a processor with a built-in TPM either.

Also, I would likely encase the TPM module, once I get one for a not crazy price.

Cheers and thank you!

Update 1: The (not what I'm looking for) 20-pin TPM connector pin spacing appears to be 2.54mm, as evidenced here, which doesn't mean anything except just another piece of data.

Update 2: I've come a little closer to what I was looking for. I decided to try re-wording my Google search once more, and lo and behold, the answer was the second search hit leading right back here to superuser.com. The second to the last answer by @user2850988, currently with 5 upvotes, has related information, but sadly the spacings listed are only for TPM-L and TPM-S, not TPM-M:

Please note that on the mechnical part there at least 3 different types. See as well for the electrical part: LowPinCount-Bus (LPC bus).

pincount (14pins for M, 19 out of 20 pins for L, 17 out of 18 pins for S)

pinspacing: 2,54mm for TPM-L and 2mm for TPM-S. TPM-S has the "ident-pin" (the "missing one/stuffed hole") on 3rd last column, TPM-L has the ident pin on the 2nd last column.

edited Jan 24 '19 at 20:35 zx485

answered Jan 24 '19 at 15:20 user2850988

Solution 1:

On my Asus motherboard it has half the spacing of the USB headers next to it.
USB headers are certainly 2.54 mm, so 1.27 mm is the answer.

Obviously I don't know if there are variants with other spacing. Your motherboards might be different.
It is next to impossible to find this information online for the 14-pin TPM header. (The 20-pin has a spin-spacing indicator as suffix in the name.)