ORIGINAL DISC-LOCK WASHER FAQ's:
1. Who developed the DISC-LOCK Washer?
The DISC-LOCK Washer was
developed by DISC-LOCK International, California, USA.
2. Where are DISC-LOCK Washers
manufactured?
California, USA.
3. How does the
DISC-LOCK Washer work?
The DISC-LOCK principle consists
of two washer shaped pieces that have inclined cams on one
side and a series of ridges on the other. The greater rise
angle of the DISC-LOCK cams along with the non-slip ridges
work together to prevent loosening caused by shock and
vibration. The result is a fastening system that is
vibration-proof according to Military Standards*.
*United States Military
MIL-STD-1312, Test 7 Vibration Test Results data available
upon written request.
4. What are the chances
of a fastener loosening if DISC-LOCK Washers are fitted?
None. When
applied and installed properly DISC-LOCK Washers will ensure
the fastener remains secure.
5. Can DISC-LOCK
Washers be used under the head of cap screws in blind hole
applications?
Yes.
6. Can DISC-LOCK Washers be
re-used?
No.
7. Does a fastener fitted with a
DISC-LOCK Washer require a different torque setting from
conventional washers?
No, just use the recommended handbook torque.
8. In what sizes is the DISC-LOCK
Washer available?
17 sizes ranging from 3mm to 38mm in metric, and from #6 to
1-1/2" in imperial.
9. From what material is the
DISC-LOCK Washer made?
Standard DISC-LOCK Washers are made from
1010 Carbon Steel. DISC-LOCK also stocks from 3mm to 16mm
inclusive and #6 to 5/8" inclusive in 316 stainless steel.
We can also make special exotic materials on a custom basis.
10. Does the DISC-LOCK Washer have
a special coating?
Standard coatings are as follows, zinc-plated
to A.S.T.M. standard B633. We can specially coat on a custom
basis to your requirements.
11. Are DISC-LOCK Washers
susceptible to hydrogen embrittlement?
No, as they are baked after coating.
12. Is the DISC-LOCK Washer
corrosion resistant?
No, the standard DISC-LOCK Washer is not corrosion
resistant. However, our stainless steel washers are
corrosion resistant.
13. Are DISC-LOCK Washers
heat-treated?
Yes, they are case hardened between 40 to 55 on the Rockwell
C scale, in a rotary furnace, in a carbon nitrite
environment.
14. What is the maximum temperature
in which DISC-LOCK Washers can be used?
Standard DISC-LOCK Washers (made from 1010 carbon steel and
case hardened) can be used for applications in environments
up to a maximum temperature of 300° Fahrenheit.
Stainless Steel DISC-LOCK
Washers can be used for applications in environments up to a
maximum temperature of 1,150°Fahrenheit.
Note: To convert Celsius into
Fahrenheit, you multiply C degrees x 1.8 and add 32. E.g.
500° Celsius = 932° Fahrenheit.
15. Is the heat treat hardness of
DISC-LOCK Washers checked?
Yes, by micro hardness testing at independent testing
laboratories.
16. Are lot numbers for
checking on quality control maintained?
Yes.
17. Will the DISC-LOCK Washer save
maintenance time?
Yes, nuts & bolts fitted with
DISC-LOCK Washers don't require retightening.
18. In which type of applications
have DISC-LOCK Washers performed successfully?
DISC-LOCK washers have
outperformed all other types of loose, washered, threaded or
pinned systems in a wide range of high stress, corrosive and
vibration sensitive applications including heavy equipment,
bus and truck fleets, oil drilling rigs, public utilities,
railroads, logging and mining equipment, pipelines, military
and many more.
19. How is the DISC-LOCK Washer
fitted?
Simply mate the cams together
and place between the nut and the joint material.
20. Do you need a torque wrench
when fitting DISC-LOCK Washers?
No.
21. Can an air gun be used when
fitting DISC-LOCK Washers?
Yes.
22. Can an air-gun be used when
removing DISC-LOCK Washers?
Yes.
23. Is the DISC-LOCK Washer
patented world-wide?
Yes.
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