Crane O Ring - Generic Replacement

4432 Views 9 Replies 0 Participants Last post by bigun, Oct 24, 2007

Discussion Starter · Oct 17, 2007

A while back on AR15.com someone posted that they found a Viton O Ring from McmasterCarr that was basically the samething as the Crane O ring. Anyways, I subscribed to the thread but it is over 30 days old and I can't see it. Does anyone happen to know what the Mcmaster Carr part number is?

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Discussion Starter · #2 · Oct 17, 2007

#60 o ring

that is the size

don't know the McMaster Carr part #

http://ar15.com/forums/topic.html?b=3&f=66&t=255253

http://ar15.com/forums/topic.html?b=6&f=20&t=227504

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Discussion Starter · #3 · Oct 18, 2007

I've always been confused by that advice... "Get a #60 o-ring"

O-rings are given dash numbers that correspond to physical size. those dash numbers start at 1 and stop at 50 (55 for the high end stuff), then re-starts at 102 and continues through 475.

I have yet to find a "#60 o-ring"

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Discussion Starter · #4 · Oct 18, 2007

IndyMatt said:
A while back on AR15.com someone posted that they found a Viton O Ring from McmasterCarr that was basically the samething as the Crane O ring. Anyways, I subscribed to the thread but it is over 30 days old and I can't see it. Does anyone happen to know what the Mcmaster Carr part number is?

1201T16

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Discussion Starter · #5 · Oct 18, 2007

CharlieHo said:
I've always been confused by that advice... "Get a #60 o-ring"

O-rings are given dash numbers that correspond to physical size. those dash numbers start at 1 and stop at 50 (55 for the high end stuff), then re-starts at 102 and continues through 475.

I have yet to find a "#60 o-ring"

hmmm.....our O ring kit at work has them #'d

here is the McMaster Carr part #

1201T16

in this thread on ar15.com

http://ar15.com/forums/topic.html?b=3&f=4&t=341555

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Discussion Starter · #6 · Oct 19, 2007

ElrodCod said:
1201T16

mvician said:
here is the McMaster Carr part #

1201T16

Thanks to both of you

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Discussion Starter · #7 · Oct 24, 2007

Yes, thank you!

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Discussion Starter · #8 · Oct 24, 2007

Just take the extractor with spring to the local hardware store and ask to see the O-rings.

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Discussion Starter · #9 · Oct 24, 2007

Wouldn't the oil and solvents break down the regular rubber ones? That is reason the Cranes and the MC ones are viton right? I know viton stands up to oils and other petroleum based products.

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Discussion Starter · #10 · Oct 24, 2007

IndyMatt said:
Wouldn't the oil and solvents break down the regular rubber ones? That is reason the Cranes and the MC ones are viton right? I know viton stands up to oils and other petroleum based products.

I know it worked on my Bushmasters. But I dont have either of them any more so I cant say for sure if they hold up long term.

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