Hardware that's only used in very specific circumstances

>>1083376
>very specific
>washer
Not sure if troll or just stupid

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The portable electrical ground.

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>>1083380
>just thinking thats a normal washer

>>1083387
Split lock washers ARE normal and extremely common, and BTW aren't very good lock washers. They are cheap to make, that is all.

Tabbed safety wire washers would be specific use case washer examples, since they add a safety wire option where there was none as an afterthought.

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>>1083376
I've got a good one, but it's on my desk at work. split nut. you rotate it, slide it onto threaded rod, rotate it back, and tighten.
Picrelated, not mine but same.

>>1083399
What are the applications of this? Security?

>>1083402
Putting a nut on a rod whose ends you cannot access, and quickly putting a nut on a long rod. It's a light duty part but nicely made, and rod is mostly light duty use anyway.

>>1083402
faster application and removal

you dont have to spin it all the way from the end of a rod

>>1083413
>>1083412
Ooooh. Very cool! I've actually been in a few situations where that would have helped. Thanks for the info anons!

>>1083376
>very specific

Nice way to fail immediately faggot.

>>1083376
>tfw the german standard for spring lock washers has been withdrawn due to them being fucking useless
>still forced to use them

>>1083402
I used these when adding another layer of cable ladder to an existing installation. Beats having to take each support rod out.
>>1083412
>>1083413
Yep

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>>1083376
An oldie, but a goodie.

>>1083578
been looking for this one for a while, happen to have the german fasters one too?

>>1083578
Threadless fasteners have been a thing for a long time. They're called rivets.

>>1084088
THE JOKE


YOUR HEAD

>>1083399
[screaming Hyatt Regency victims]

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>>1084010
Not him, but here ya go anon.

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>>1083578

Screws

You only ever use them when you want to scew something together

Expansion bolts

You only ever use them when you want to bolt something the fuck donw

Nails

You only ever use them when you want to nail something together

>>1083387
Those are almost obligatory when wiring circuit pannels, if used, the part tightened to the plate will never get loose.
Also useful with screws mounted on vehicles or subjected to vibrations when safety nuts can't be used.

It's a spring washer aka locking washer. .....crap, don't trust.

>>1083399
...I never knew those existed but could have used em dozens of times.

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>>1084088

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>>1083578
I've got some more of those!

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>>1085532

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>>1085534

>>1085536

>braile bolt

>pipe wrench bolt

>>1083376
yeah, never

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where do I buy these?

NASA says thouse spring washers dont lock
US and UK NAVY say the same thing

>>1086504
Do they say the same about all the lock washers, or just those in OP's pic?

>>1084088
I always thought they were called nails and date back even farther

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>>1083446
>>1086512

As a German, I can confirm. Helical washers, Belleville washers, serrated washers, they all don't work. Therbest way: Nordlock washers.
https://www.youtube.com/watch?v=DVyShMfKmqE
The company I got my engineering technican's degree in built screening machines that vibrate like mad all day, every day. They should know.

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>>1086591

>>1083383
my god, fuckin filipinos

>>1086591
>not just using a drop of loctite

>>1086591
>Belleville washers
sometimes they work. i've got a set of 3 on a chipper chute - the top two secure it well, the bottom one vibrates out sometimes

>>1085010
>nails/screws
>only for joining two things

Have you ever hang a picture? Or needed to puncture hole in something?

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>>1086591

Serrated washers can work if properly made, but it has to be a piece of solid piece of forged and then hardened steel. So 2 cents instead of 1 cent.

Just like Nord Lock clamp force actually has to increase before it comes lose as it goes over the "hump". But instead of that hump being between two washers like in Nord Lock, it's simply between the washer and the dented metal of the bolt and clamping surface.

>>1086982
i feel like it would just make a ramp for it to easily slide out of the metal or bolt when you tighten it down since it doesnt just instantly get mushed down into them, it has to be rotated into place

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>Belleville washers

are these even locking washers?
id always used these as a type of spring shim

>>1086969
>sometimes they work
"sometimes" is not an adjective that should be used in engineering where safety/certainty matters.

>>1084207
893 detonating bolt could be useful, Im just sayin.

>>1087120
Technically they're disc springs, not washers, but you can use them in that fashion.

>>1083397

Split washers don't actually work at all, much less shitty.

They've done several studies to find they do no good at all, but they still get used a lot.

Just use loctite, or some actual locking mechanism.

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Plebs

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>>1084201
If anything it was not using something like that that made that particular Hallmark moment.