Parts Wanted O rings for OS

[FloridaScaleBoater]

Yeh, I have a set from a new needle.
You measure & I'll measure to see what we come up with.

I'm coming up with some numbers that are not in McMaster Carr??
I'm getting:
ID 1.80MM .070-.071"
OD 3.15-3.16MM .125"
X-section, too small for me to measure
I'm seeing nothing In McM Carr
Maybe I should try measuring the groove that it sits in??
And the OD while in the groove??
Any direction folks.

 

[dave roach]

Let me get you guys the right part no for the orings and if you need some i can get them.

 

[FloridaScaleBoater]

Let me get you guys the right part no for the orings and if you need some i can get them.

That would be great Dave.
I have a butt load of these needles and have never replaced any of the O-Rings in them (10-15) plus years.
And one of my boats is showing symptoms of an air leak somewhere.

 

[dave roach]

I will give you guys the answer in the morning Working.

Thanks Dave

 

[dave roach]

I contacted my suppler and he is out of them and i'am just weighting for a phone call from him.the oring john is talking about is for the Stu Barr needles.

 

[John Beardslee]

I contacted my suppler and he is out of them and i'am just weighting for a phone call from him.the oring john is talking about is for the Stu Barr needles.

The OS o-ring appears to be 1m x 2m x 1m.
A friend ordered the from MMC with the pn Grim provided, catalog shows 1m x 3m x 1m but the package shows a different pn and the ID is not 3m so MMC has a problem. He’s going to contact MMC. Meanwhile we measured his last OS spare and we think the ID should be 2mm.

 

[John Beardslee]

I contacted my suppler and he is out of them and i'am just weighting for a phone call from him.the oring john is talking about is for the Stu Barr needles.

The Bob Violet and Stu Barr use the 1/16” x 3/16” x 1/16” size o-ring

 

[John Beardslee]

Update on metric o-rings. If you go to the Oring store website you’ll find metric orings with a thinkness lesser than the 1mm minimum thickness offered by MMC.

 

[John Beardslee]

After checking an OS needle valve o-ring using a digital caliperI conclude the size to be: .5mm x 2mm x .5mm
(Note: metric O-rings are defined by their cross section and the I.D.) If anyone has access to a more refined measurement process jump in. This size is currently back ordered at the O-ring Store, I haven’t extended a search beyond that point.