UMNUMZAAN - Replacement Thumbstud O-rings

jumpstat · Jan 26, 2018

Hi all,

The original o-rings gave way when I took the folder out this morning,

Is there a specific brand/type material o-ring that is better than the originals? My folder is about 2 years old. Is this the norm, I mean to be replacing the o-rings?

Thanks in advance and have a great weekend.

Josh K · Jan 26, 2018

Look up part 9464K11 on McMaster. Viton -006 o-rings, 100 for $4.48

jumpstat · Jan 26, 2018

Josh K said:
Look up part 9464K11 on McMaster. Viton -006 o-rings, 100 for $4.48

Thanks for the heads up. I'll definitely look it up.

Ajack60 · Jan 26, 2018

CRK has replacement O-rings on their web site.
Yes, it's normal for them to become flat and need replacing.
There's a thread about after market O-ring replacements in different colors.

Josh K · Jan 26, 2018

Ajack60 said:
CRK has replacement O-rings on their web site.

I should be more specific:

Josh K said:
Viton -006 o-rings

These are not the same o-ring material as CRK, they are the same size. They are made of a fluoroelastomers that, in my experience, is much more durable than EPDM, nitrile (Buna-N), polyurethane, etc. CRK issues polyurethane o-rings with the knife and sells them as replacements.

Thin-Slice · Jan 26, 2018

Umnumzaan O-Rings size 60- O-rings by Danco (1/4” OD x 1/8” ID x 1/16” costs $2.49 for 10ct at Lowe’s

JNewell · Jan 27, 2018

ref=oh_aui_search_detailpage <- Amazon link.

These are the correct size and have proven bullet-proof.

Josh K · Jan 28, 2018

JNewell said:
These are the correct size and have proven bullet-proof.

It's true, looks exactly like the ones from McMaster but only $2 more!

Carter Hall · Jan 28, 2018

I got these ones too. They work great and I was able to buy a smaller quantity as an add on purchase.

jumpstat · Jan 29, 2018

Thanks all for the advice, I found a local store that sells fittings, bearings, and automotive o-rings. I'll be heading there this weekend for a look see. Coloured o-rings would be something different and cool factor for this folder.

Tetsujin 140.6 · Jan 30, 2018

This thread has some information from my search.

https://www.bladeforums.com/threads/umnum-o-rings-size-and-sources.1522149/#post-17491959

JNewell · Jan 30, 2018

Josh K said:
It's true, looks exactly like the ones from McMaster but only $2 more!

Sure, but for $2, people with an Amazon account may find it easier to order from Amazon rather than add yet another cyber vendor relationship to the mix.

Josh K · Jan 30, 2018

JNewell said:
Sure, but for $2, people with an Amazon account may find it easier to order from Amazon rather than add yet another cyber vendor relationship to the mix.

Eh. I guess. But Amazon is a crapshoot sometimes especially when you're trying to find a specific part. I'd guess anyone looking for components or raw materials more than once will end up on McMaster.

slamer · Mar 4, 2018

Thank you for the response ...I would hve ordered the O-rings from CRK but the shipping was more than the product

Thank you!