![](/globalassets/mediavalet/web-assets/pictures/apps/nord-lock-logo.png?mode=pad&width=600)
HOW-TO-INSTALL NORD-LOCK WASHERS
COUNTERBORE ASSEMBLY
1.0
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/counterbore/01_assembly-counterbore.png?mode=pad&width=800&heightratio=0.3333)
Easy and quick to install
Prevents bolts and nuts from loosening
No need for re-torqueing
Guaranteed preload over time
YOU WILL NEED THE FOLLOWING ITEMS
Requires one pair of Nord-Lock washers.
All our washers are laser marked (Nord-Lock brand name, control number, type code). This is to ensure you receive genuine Nord-Lock washers and enables full traceability down to the first assembly.
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/parts_single_washer2.png?mode=pad&width=800&heightratio=0.3333)
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/counterbore/parts_counterbore.png?mode=pad&width=800&heightratio=0.3333)
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/parts_torque_wrench.png?mode=pad&width=800&heightratio=0.3333)
PREPARATION
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/05_preparation_pairs.png?mode=pad&width=800&heightratio=0.3333)
Nord-Lock washers always come in pairs. If your washer is accidentally separated make sure the washers are mounted cam facing cam.
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/counterbore/damaged_counterbore.png?mode=pad&width=800&heightratio=0.3333)
Discard damaged bolts.
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/07_preparation_standard.png?mode=pad&width=800&heightratio=0.3333)
Do you have a tight fit between the bolt and the hole? Use the standard washer.
When to ask for support
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/09_support.png?mode=pad&width=800&heightratio=0.3333)
FINAL CHECK
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/counterbore/plain_washer_counterbore_800x640.png?mode=pad&width=800&heightratio=0.3333)
Never use a plain/flat washer with Nord-Lock washers. If you need a larger diameter washer, use the Nord-Lock SP washer.
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/counterbore/single_washer_counterbore_800x640.png?mode=pad&width=800&heightratio=0.3333)
Never divide the washers and only use one of the washers.
![](/globalassets/mediavalet/web-assets/pictures/nord-lock/instructions/counterbore/correct_counterbore.png?mode=pad&width=800&heightratio=0.3333)
Correct installation.