Where do you all buy your o-rings?

[NYCrecdiver]

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!

 

[crofrog]

McMaster or dive gear express

 

[boat sju]

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:

The O-Ring Store LLC, We make getting O-Rings easy!

Discover millions of high-quality O-Rings, hydraulic seals, and custom solutions at The O-Ring Store. We offer AS568 and Metric O-Rings, ISO9001:2015 certified products, and fast, reliable service to meet all your sealing needs. Shop now for top-grade materials and industry-leading expertise to...

www.theoringstore.com

 

[tarponchik]

Lowe's used to sell a kit of multisized O-rings. But if I know the exact size, I go to Amazon.

 

[Cthippo]

Amazon

 

[Etmutt]

Ali express

 

[rsingler]

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.

 

[happy-diver]

214	1-1/4"	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
116	15/16"	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
112	11/16"	1/2" 0.500"	3/32" 0.103"	Standard DIN Regulator/Valve (Nearly all DIN regulators) Duro: NBR 70/90, FPM 75
111	5/8"	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
110	9/16"	3/8"	3/32" 0.103"	MDE Yoke Valves Duro: NBR 90
015	11/16"	9/16"	1/16" 0.070"	Cylinder Valve Bonnet Nut Duro: NBR 70, FPM 70
014	5/8"	1/2" 0.500"	1/16" 0.070"	Standard Yoke Regulator/K-valve Duro: NBR 90, FPM 70
013	9/16"	7/16"	1/16" 0.070"	Large Low-Pressure Port/Hose (1/2" UNF) Duro: NBR 70, FPM 70
012	1/2"	3/8"	1/16" 0.070"	High-Pressure Port/Hose (7/16" UNF) Manifold and Manifold Port Plugs Duro: NBR 90, FPM 90
011	7/16"	5/16"	1/16" 0.070"	Standard Low-Pressure Port/Hose (3/8" UNF) Duro: NBR 70, FPM 70
010	3/8"	1/4" 0.250"	1/16" 0.070"	Low-Pressure Hose/2nd Stage Regulator Cylinder Valve Stem Duro: NBR 70, FPM 70
006	1/4"	1/8" 0.125"	1/16" 0.070"	BC Power Inflator Duro: NBR 75, FPM 75
003	3/16"	1/16"	1/16" 0.070"	High-Pressure Hose/SPG swivel Duro: NBR 90, FPM 90

What rhymes with kit

 

[Kupu]

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.

 

[NYCrecdiver]

214	1-1/4"	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
116	15/16"	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
112	11/16"	1/2" 0.500"	3/32" 0.103"	Standard DIN Regulator/Valve (Nearly all DIN regulators) Duro: NBR 70/90, FPM 75
111	5/8"	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
110	9/16"	3/8"	3/32" 0.103"	MDE Yoke Valves Duro: NBR 90
015	11/16"	9/16"	1/16" 0.070"	Cylinder Valve Bonnet Nut Duro: NBR 70, FPM 70
014	5/8"	1/2" 0.500"	1/16" 0.070"	Standard Yoke Regulator/K-valve Duro: NBR 90, FPM 70
013	9/16"	7/16"	1/16" 0.070"	Large Low-Pressure Port/Hose (1/2" UNF) Duro: NBR 70, FPM 70
012	1/2"	3/8"	1/16" 0.070"	High-Pressure Port/Hose (7/16" UNF) Manifold and Manifold Port Plugs Duro: NBR 90, FPM 90
011	7/16"	5/16"	1/16" 0.070"	Standard Low-Pressure Port/Hose (3/8" UNF) Duro: NBR 70, FPM 70
010	3/8"	1/4" 0.250"	1/16" 0.070"	Low-Pressure Hose/2nd Stage Regulator Cylinder Valve Stem Duro: NBR 70, FPM 70
006	1/4"	1/8" 0.125"	1/16" 0.070"	BC Power Inflator Duro: NBR 75, FPM 75
003	3/16"	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!