Where do you all buy your o-rings?

Please register or login

Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

Benefits of registering include

  • Ability to post and comment on topics and discussions.
  • A Free photo gallery to share your dive photos with the world.
  • You can make this box go away

Joining is quick and easy. Log in or Register now!

NYCrecdiver

ScubaBoard Supporter
ScubaBoard Supporter
Messages
325
Reaction score
250
Location
NY, NY
# of dives
50 - 99
Hi,

I'll be taking a class on regulator servicing and am in the process of putting together my workbench.
I was wondering where you buy your o-rings? Looking to get started with one of those kits containing a bunch of o-rings of common sizes in a little box with compartments. I'll be using service kits for the 1st and 2nd stages so it's for other stuff like hoses, spgs, transmitters, etc.

Thanks!
 
There are a couple of Grainger stores out in Brooklyn that can get you any o-ring you want. If they're like my local store here in Michigan they might need a few days to get them for you if not currently in stock. I know it can be a PITA to get around NYC. If you call them ahead of time maybe they'll check their inventory for you.

In addition to crofrog's suggestions here's another online source:
 
Lowe's used to sell a kit of multisized O-rings. But if I know the exact size, I go to Amazon.
 
The O-ring Store, LLC
Ace Seal (in CA)
McMaster Carr
Precision Associates Inc
Marco Rubber

It's a juggling act between availability, the cost of the orings, minimum order quantity, and shipping charge.

McMaster is fastest, but shipping is costly and they only sell in 25's, 50's or 100's, depending upon the particular oring.

The O-ring Store, LLC allows small min quantities. Some orings are more expensive than McM; some are not. For BS1806 and other non-US-standard orings, The Oring Store, LLC is my go-to.

For custom runs, PAI and Ace Seal have reasonable setup charges if they have the die.

Marco is way overpriced, but high quality.
Overseas mfrs have wildly varying quality, due (for example) to introduction of varying amounts of fillers like carbon black. If you want to prove that to yourself, just take a cheap digital luggage scale and pull on two identical orings from different mfrs until they break. You can see manufacturer quality variability quite simply with that simple test of tensile strength.
I simply do not buy from eBay, Amazon or AliExpress.
 
2141-1/4"1"
1.000"
1/8"
0.139"
Cylinder with Large Neck/Valve (3/4" NPS)
(All Aluminum, most Steel cylinders)
Duro: NBR 90, FPM 90
11615/16"3/4"
0.750"
3/32"
0.103"
Cylinder with Small Neck/Valve (7/8" UNF)
("Genesis" 3500 psi Steel cylinders)
Duro: NBR 90, FPM 90
11211/16"1/2"
0.500"
3/32"
0.103"
Standard DIN Regulator/Valve
(Nearly all DIN regulators)
Duro: NBR 70/90, FPM 75
1115/8"7/16"3/32"
0.103"
Small DIN Regulator/Valve and Old Yoke Valves (You know if you need this one)
Duro: NBR 70, FPM 70
1109/16"3/8"3/32"
0.103"
MDE Yoke Valves
Duro: NBR 90
01511/16"9/16"1/16"
0.070"
Cylinder Valve Bonnet Nut
Duro: NBR 70, FPM 70
0145/8"1/2"
0.500"
1/16"
0.070"
Standard Yoke Regulator/K-valve
Duro: NBR 90, FPM 70
0139/16"7/16"1/16"
0.070"
Large Low-Pressure Port/Hose (1/2" UNF)
Duro: NBR 70, FPM 70
0121/2"3/8"1/16"
0.070"
High-Pressure Port/Hose (7/16" UNF)
Manifold and Manifold Port Plugs
Duro: NBR 90, FPM 90
0117/16"5/16"1/16"
0.070"
Standard Low-Pressure Port/Hose (3/8" UNF)
Duro: NBR 70, FPM 70
0103/8"1/4"
0.250"
1/16"
0.070"
Low-Pressure Hose/2nd Stage Regulator Cylinder Valve Stem
Duro: NBR 70, FPM 70
0061/4"1/8"
0.125"
1/16"
0.070"
BC Power Inflator
Duro: NBR 75, FPM 75
0033/16"1/16"1/16"
0.070"
High-Pressure Hose/SPG swivel
Duro: NBR 90, FPM 90


What rhymes with kit
 
It might not take long to outgrow the premade oring kits, they tend to have lots of unneeded sizes and then not enough commonly used scuba orings. Making a custom kit is a solution.
I mostly buy from Oringsandmore and The Oring Store, with a few hard to find types from McMaster Carr.
orings.jpg
 
2141-1/4"1"
1.000"
1/8"
0.139"
Cylinder with Large Neck/Valve (3/4" NPS)
(All Aluminum, most Steel cylinders)
Duro: NBR 90, FPM 90
11615/16"3/4"
0.750"
3/32"
0.103"
Cylinder with Small Neck/Valve (7/8" UNF)
("Genesis" 3500 psi Steel cylinders)
Duro: NBR 90, FPM 90
11211/16"1/2"
0.500"
3/32"
0.103"
Standard DIN Regulator/Valve
(Nearly all DIN regulators)
Duro: NBR 70/90, FPM 75
1115/8"7/16"3/32"
0.103"
Small DIN Regulator/Valve and Old Yoke Valves (You know if you need this one)
Duro: NBR 70, FPM 70
1109/16"3/8"3/32"
0.103"
MDE Yoke Valves
Duro: NBR 90
01511/16"9/16"1/16"
0.070"
Cylinder Valve Bonnet Nut
Duro: NBR 70, FPM 70
0145/8"1/2"
0.500"
1/16"
0.070"
Standard Yoke Regulator/K-valve
Duro: NBR 90, FPM 70
0139/16"7/16"1/16"
0.070"
Large Low-Pressure Port/Hose (1/2" UNF)
Duro: NBR 70, FPM 70
0121/2"3/8"1/16"
0.070"
High-Pressure Port/Hose (7/16" UNF)
Manifold and Manifold Port Plugs
Duro: NBR 90, FPM 90
0117/16"5/16"1/16"
0.070"
Standard Low-Pressure Port/Hose (3/8" UNF)
Duro: NBR 70, FPM 70
0103/8"1/4"
0.250"
1/16"
0.070"
Low-Pressure Hose/2nd Stage Regulator Cylinder Valve Stem
Duro: NBR 70, FPM 70
0061/4"1/8"
0.125"
1/16"
0.070"
BC Power Inflator
Duro: NBR 75, FPM 75
0033/16"1/16"1/16"
0.070"
High-Pressure Hose/SPG swivel
Duro: NBR 90, FPM 90


What rhymes with kit
Great list! Thanks for sharing!
 

Back
Top Bottom