|
This page lists our range of Nord-LockTM
locking washers.
These innovative washers provide an
excellent solution for preventing loosening of nuts and bolt heads in
high vibration applications.
In IC powered model applications, they
are particularly suitable for engine hold-down bolts and engine
mufflers/silencers,
but are equally useful for vehicle and many other engineering applications.
Manufactured in carbon steel and
protected against corrosion by a zinc flake surface finish, these washers are
re-usable,
and suitable for use with screws and bolts up to high tensile grades such as our
grade 12.9 cap screws.
They are suitable for high
temperature applications and provide a locking method for fastenings
from low through to high torque assemblies.
In applications with bolts/screws
into threaded holes, the washers are placed under the bolt heads. No other
washers are required
With bolt/screw and nut assemblies, a Nord-Lock washer pair is required under
the nut and
also under the bolt head.
|
How do they work? |
 |
The principle is brilliantly simple.
Used in pairs, the surface contacting the bolt head (or nut) and
the fixture is ridged to give a high friction connection, and
the two washers have interlocking cams with an angle that
slightly exceeds the angle of the screw thread.
To loosen the assembly requires the
washers to climb the cams at a greater rate than the thread
unscrews, so the load in the
screw actually increases during initial un-tightening. This
ensures that once tightened, the connection will not become
undone without the application of a un-tightening torque on the
screw or nut.
|
We stock Nord-Lock washers in metric M3, M3.5, M4, M5
and M6 sizes
Some sizes are also suitable for use with
UNC threads - where this is the case the UNC thread size is also stated
below
Nord-Lock washers are despatched in pairs (2
washers are required per bolt or nut).
To order, click on the 'Add to Order' button
alongside the item of your choice. You can select the quantity on the order
form (default is 1). To continue ordering other items, use the 'Continue
Shopping' button on the order form.
You
can review and edit your order, or submit your order at any time by using the
button at the bottom of the list or the top of any of our web pages.
All prices include 20% VAT
For
Thread: |
Outside
Diameter
(mm) |
Thickness
(per pair)
(mm) |
MF Ref |
Pack Qty
(Pairs) |
Pack
Price |
You can enter/change the
number of items on the order form |
| |
|
|
|
|
|
|
|
M3 / 5 UNC |
7.1 |
1.85 |
MF-NLW03 |
1 |
£0.60 |
|
|
4 |
£2.15 |
|
|
20 |
£9.60 |
|
| |
|
|
|
|
|
|
| |
Sorry - this item is currently out of stock |
|
|
|
M3.5 / 6 UNC |
7.6 |
1.8 |
MF-NLW35 |
1 |
£0.60 |
|
|
4 |
£2.15 |
|
|
20 |
£9.60 |
|
| |
|
|
|
|
|
|
|
M4 / 8 UNC |
7.7 |
1.8 |
MF-NLW04 |
1 |
£0.65 |
|
|
4 |
£2.35 |
|
|
20 |
£10.50 |
|
| |
|
|
|
|
|
|
|
M5 / 10 UNC |
9.1 |
1.8 |
MF-NLW05 |
1 |
£0.65 |
|
|
4 |
£2.35 |
|
|
20 |
£10.50 |
|
| |
|
|
|
|
|
|
|
M6 / 1/4" UNC |
10.9 |
1.8 |
MF-NLW06 |
1 |
£0.75 |
|
|
4 |
£2.65 |
|
|
20 |
£11.95 |
|
| |
|
|
|
|
|
|
| 
