https://www.nord-lock.com/services/instructions/nord-lock/counterbore-assembly-instruction/?cachebreak=true

HOW-TO-INSTALL NORD-LOCK WASHERS

COUNTERBORE ASSEMBLY

1.0

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.

PREPARATION

Nord-Lock washers always come in pairs. If your washer is accidentally separated make sure the washers are mounted cam facing cam.

Discard damaged bolts.

Do you have a tight fit between the bolt and the hole? Use the standard washer.

INSTALL AND TORQUE THE NORD-LOCK WASHERS

If you use lubrication, this is when you apply it. Go to this link for more information about lubrication.

Place the washer on the bolt and put it in the hole.

Tighten the joint according to the Nord-Lock torque guidelines.

When to ask for support

FINAL CHECK

Never use a plain/flat washer with Nord-Lock washers. If you need a larger diameter washer, use the Nord-Lock SP washer.

Never divide the washers and only use one of the washers.

Correct installation.