bvcu, awblain,
I have occasionally looked at this thread and I'm sure it's been mentioned before, but torque loadings are covered even when they're not specified. The aircraft APs have a section (topic 6 I think for Seaking) that specifically gives max torque settings for different diameter bolts/studs etc. It covers everything you need to know to safely tighten a fastener where the procedure doesn't give a setting, hence no need to etch on a bolt or such like.
An example from memory would be the trunnions that hold the primary servo jacks onto the gearbox on a Seaking, they are ( i'm sure you would agree) pretty critical. When I worked on the beastie I'm sure they weren't torque loaded, but you obtained the figure for the maximum torque from the AP, factored in run down torque and tightened the nut. The nut was in safety the torque was in safety and everyone was happy.
The fact that MAP (formally JAP) has it's own section on assisted escape devices independent checks, should have caught any overtightening I would have thought, but I do admit I haven't worked on bang seats since Seafield park training.
Cheers now