The DSP7200SE service manual specifies 2.6Nm on all drivers, the same would go for the 8ks. I would assume that same would apply to 3200 and 5200. There was no mention of torque specs in the 5200 and 7200 service guides, in fact these only go as far as stating that the reassembly procedure is reverse of the disassembly method.

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#1 Trinnov Altitude 32-8-16, 271, 8000XE, 7200SEHC, 7200.2, Seaton F18, JL Fathom F113, Revel w990's, Kef R7, ATI 528 Amp, JVC RS4100K, SI screen. Roon Nucleus+, Eno AG, Eno M link, 218.
#2 Mark Levinson No5105, Ayre VX8 and CX8, Vandersteen Treo CT, Preamp varies.
#3 Meridian Ellipse