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'O' ring size? - where can I find?

R/C Submarine modelers

Postby Dolphin » Sun Sep 28, 2003 4:27 pm

What is the correct size 'O' ring for sealing the WTC-3 (3 inch outside diameter)? Is it trial and error, or is there a specific size known and commonly used?

Ace hardware has one that seems close....Stock # 4203Y51
2 7/8" x 2 1/2" x 3/16".

Is this it?

Thank you,

Steve Reichmuth

Postby Tom Spettel » Tue Sep 30, 2003 12:00 am

Steve I went to Rocket Seals here in denver today and found out that there are many industry standards!! as far as seals and O-rings are concerned...
I have a phone number for you
Parker 606-269-2351
standads catlog
this should get you started..
P.S. Parker also makes some great O-ring grease to.
A list and a plunge and down she goes to Davy Jones.
Raiders of the Deep
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Postby Robse » Tue Sep 30, 2003 11:23 am

Hi, fellars..

Ehm.... "O-ring grease"? Would it be OK to use Vaseline, or some other non-oil based stuff (silicone?), or is it vital to the degree of water proofness that "O-ring grease" is used?
Yours Sincerely, Robert Holsting, Denmark
1/81 SSBN Ohio Class scratch builder, more at

"Never be afraid to try something new; remember that it was amateurs who build Noah's Ark, and professionals who build the Titanic"
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Postby TMSmalley » Tue Sep 30, 2003 1:15 pm

Vaseline is petroleum based which will speed the degradation of rubber, as will oil. You are better off using silicone grease available at hardware or plumbing shops - also scuba diving suppiers shops sell it for lubricating <GASP> O-rings!
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