Bolt, flat washer and sprint washer: what order?

thomas1975April 15, 2013

Sorry, I wasn't sure what section to put this question in...

I'm putting together a table and the directions say to put the bold, then flat washer and then spring washer, but the picture seems to show the spring washer in the middle. Is there a 'standard' order that they should go in? Here's what I'm referring to (click to enlarge):

You can see in the picture that the both the description and the picture say to do H1, H3, H4 (which is bolt, flat, spring), but if you look closely at the picture of the table, it seems that the spring washer is really in the middle.

Thanks for any help!

Here is a link that might be useful:

This post was edited by thomas1975 on Mon, Apr 15, 13 at 13:08

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hendricus

Follow the order given 1, 3, 4. If you put the spring washer in between the flat washer and bolt it doesn't do its job which is to keep the bolt from turning back out. The spring washer has to go between the bolt and the leg, the flat washer is only to give the bolt a bigger head.

    Bookmark   April 15, 2013 at 5:46PM
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sombreuil_mongrel

The washers are placed beneath the nut, not the bolt head. If the bolt head is too small to securely overlap a too-large bolt hole, you can use a flat washer to obtain a proper seat.
The order is always the lockwasher directly under the nut.
Casey

    Bookmark   April 15, 2013 at 8:07PM
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hendricus

The washers are placed beneath the nut, not the bolt head.

There is NO nut in the picture or the directions. The directions say to screw it into the chair leg.

    Bookmark   April 15, 2013 at 10:26PM
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brickeyee

Spring (AKA 'split lock washer') washer directly under the screw head. Flat washer against the material to spread force out (especially for thin tubing or thin material).

    Bookmark   April 16, 2013 at 12:51PM
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sdello

I agree. The brick-man is dead on again!

    Bookmark   April 16, 2013 at 4:17PM
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hendricus

So, in this instance the manufacturers instructions are to be ignored.

    Bookmark   April 16, 2013 at 5:09PM
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thomas1975

Thanks everybody!

    Bookmark   April 17, 2013 at 7:28AM
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brickeyee

"So, in this instance the manufacturers instructions are to be ignored."

Keeping the washer from rotating is not the goal.

Keeping enough tension on the screw to reduce loosening is the idea.

Internal tooth 'star' type lock washers are better at holding things tight, especially in electrical use (though that does not matter here).

What would be much better here are locking screws with either a deformable patch on them (expensive) or the correct grade of thread locking compound Loctite.

Every piece of this type of DIY assembly I have ever seen comes loose without Loctite.

Just do not use the more permanent (AKA 'staking' grades that require heat for disassembly).

And NEVER squeeze the air out of a bottle and then cap it that way.

It is the lack of air that allows the material to set up in the threads.

    Bookmark   April 17, 2013 at 1:11PM
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homebound

"So, in this instance the manufacturers instructions are to be ignored."

Yes. The pic was good, but labeled incorrectly.

    Bookmark   April 25, 2013 at 5:49PM
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brickeyee

And when you tighten the screw drive the split washer flat.

    Bookmark   April 27, 2013 at 10:53AM
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renovator8

the instructions seem quite clear; they don't actually give an installation order relying instead on the diagram.

    Bookmark   April 30, 2013 at 9:04PM
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homebound

If they hadn't labeled those washers in the diagram, you would be right.

    Bookmark   May 2, 2013 at 8:32AM
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