Apeks O-rings vs. McMaster

[buddhasummer]

Here's a crosswalk using Buddha's data, along with a Word file from another of our SB members from long ago.
As you'll see, I can't find a spec for a BS607, but coincidentally, it matches an old Parker 5-series perfectly.
McMaster has EPDM orings in most of the sizes, but the Shore is only 70.
If you take Viton, you'll get Shore 75, which is closer.
There's only one o-ring which is N/A via McMaster.
I've coded the crosswalk green if the McMaster o-ring manufacturing tolerance covered the spec size on Buddha's list.
It's in yellow if the manufacturing tolerance was slightly smaller or larger than the listed size.
I frankly can't believe that Apeks would spec a standard cross-section like 1.78mm/0.070'', and then use an oddball ID.
My guess is that the list ID's are rounded off. It was the very last o-ring (a BS607) that I can't find in any list, that made me think this way, since it perfectly matches a Parker 5-632.

A shining star, thanks Rob.

 

[buddhasummer]

As I no longer dive Apeks seconds I never really looked into properly.

 

[rsingler]

Does anyone have an equivalent document for Aqualung??

 

[buddhasummer]

Think I might, let me check.

 

[Scubagaskets]

Hope this will help you people

You can find the missing o-rings at scubagaskets

AP1300 O-rings EPDM Sh70 as APEKS part number AP1300
AP2041 Scuba 2nd stage Poppet O-rings EPDM Sh70
AP5711 Viton O-rings FKM Sh75-as APEKS AP5711 AP5711

Kind Regards
Nicolas

 

[buddhasummer]

More options are always good, thank you.

 

[rsingler]

So, @Scubagaskets where do I find the dimensions for
Viton O-rings FKM Sh75-as APEKS AP5711 AP5711 that you advertise as an equivalent for AP5711?
I don't see it on the Application list in your link.
I don't see it on the specification link. What are its dimensions?

 

[Scubagaskets]

2.50mm id x 1.00 cs

 

[Scubagaskets]

More options are always good, thank you.

That was identified by stereoscopic camera and is 100% correct

 

[Couv]

@rsingler Have you written to Santa yet?
https://www.amazon.com/Fujifilm-Fin...ds=Stereoscopic+Camera&qid=1604151187&sr=8-19