PRODUCT INFORMATION
INDEX
DATE
Dep.2
IM-C-C-00-002e B
February 2012
TIGHTENING TORQUES FOR COMMERCIAL BOLTS & NUTS
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3. AUXILIARY SCREW DRIVING PRODUCTS
All screwed joints must have all their parts perfectly clean and assembled applying oil to the threads. For special
applications, different products are usable for assembly. The following situations occur.
- Screws that never need to be removed, which can come loose due to vibration or for other reasons. In those
cases, high strength threadlocker (Loctite 270) will be used.
- Screws that will be removed only on rare occasions, which can come loose due to vibration or for other
reasons. In those cases, medium strength threadlocker (Loctite 243) will be used.
- Screws that never need to be removed, which fix low-pressure oil or water pipes, where gaps between threads
are small. Medium strength thread sealant (Loctite 542) will be used.
- Screws that will have to be removed, which fix low-pressure oil or water pipes, where gaps between threads
are small. They require low-strength thread sealant (Loctite 511).
- Screws that never need to be removed, which fix high-pressure oil or water pipes, where gaps between
threads are important. They require high-strength threadlocker (Loctite 270 with Activator N [7649]).
- Awkward bolts and nuts, where high tightening torque accuracy and a known steady coefficient of friction are
necessary, which will have to be removed, even after working in bad conditions. They require the application
of solid lubricants for bolted metal joints (Molykote 1000).
2.1.39
O&M_2.002211.810_A_10_2016
