Have you ever reused a factory bolt that was shown in the FSM as a non-reusable part, but you knew there was nothing physically wrong with using the bolt except the colored painted on the thread ends was worn off?
If you had any experience with thread lockers you probably figured it was a type of adhesive, to keep the bolt from backing out and loosening.Here are some torque values for factory fasteners with pre applied Dri-Lock adhesive
For example crank bolts have a pre applied coating on their threads of yellow DriLock adhesive and the torque value given has factored in the reduced stress level of the coating on the threads. If the torque value is 187 ft. lbs with the (RED) DriLock then if the threads are clean and dry. The torque value would increase to about 207 ft. lbs
Loctite thread locker should also be factored in to the torque value of a fasteners original specification if it did not require or specify in its original assembly or instructions.
The same holds true for anti-seize compounds, as it does for lubricants such as motor oil, and molybdenum based lubricants. Basically anything that changes the surface of the threads resistance towards its tensile stress.
Here is a link to the color codes of Loctite brand DriLock adhesives.
Dri-Lock 200 (yellow) 0.60
Dri-Lock 201 (yellow) 0.75
Dri-Lock 202 (green) 0.65
Dri-Lock 203 (silver) 0.55
Dri-Lock 204 (red) 0.90
To find an original value for a fastener that is used without the adhesive the torque value would be divided by the adjusted specified value.
Loctite has many different formulas and consistencies (paste,liquid, gel, stick) and strengths. They are not all entirely applicable to passenger vehicles use and I will not have all of the additional technical applications or instruction material information, if someone does please post it on this thread.
Here are some links with metric fastener torque information