On Sunday, March 30, 2014 5:20:27 PM UTC-7, Doug D. wrote:

... I'm interested in the 3M 10236-0210EC (Digikey #MRB36A-ND), which is a
36-contact, 0.050" IDC Wiremount Receptacle. The drawing on page 2 of their
datasheet shows a 0.050" contact spacing, but I don't see how this can be. A
36-wire, 0.05" pitch cable should be (36-1)*0.05" = 1.75" wide.

There's a top row and bottom row of the connector; so, the connector width
A (from center of first to center of last contact) is (18-1)* 0.05"= 0.850
just as the drawing shows. The pitch of the WIRES is 0.025", the even
wires mate with a bottom-row and the odd ones with a top-row connector pin.