self-locking system is the solution to one of the most
persistent problems in the field of fastener technology...
Durlok nuts and bolts will not loosen or unscrew even under the
most severe transverse jarring and vibration.
The Durlok fastener system is effective on a wide variety of
engineering materials including steel -- both heat-treated and
non heat-treated, cast irons including nodular types,
non-ferrous metals and sheet materials.
Durlok nuts and bolts are suitable for re-use because the
serrations cause relatively little damage to the clamped