Standard ORing Sizes

[b1gcountry]

I just thought I'd share a couple of my numbers for O Rings that I use for various stuff.

SAE O-Ring sizes are given as three digit dash numbers. The first is thickness, the next two are

diameter. So a -110 is thicker, but smaller than a -019.

Nitrile/Buna-N orings are typically cheapest. Viton is arguably better for O2 service. Durometer is

hardness of the O-Ring. A higher number means its harder. 'V90' will mean 90 durometer Viton.

-227 N70 Medium Salvo Canister O-Ring

-214 V90 Tank Neck O-Ring for most tanks (3/4NPS)

-130 N70 Dive Rite P-Valve outer cover

-116 V90 Tank Neck O-Ring for Genesis Tanks (7/8 UNF)

-112 V90 Most DIN Regulators valve interface
LPI large body O-Ring

-111 V90 Some small DIN Regulators valve interface
Parker Quick Disconnects

-110 N70 LPI Plunger

-015 V90 Bonnet Nut O-Ring for non-Thermo valves/manifolds

-014 V90 Yoke Valve face O-Ring

-013 V90 Non-Standard 'large' LP ports/hoses

-012 V90 HP ports/hoses
LPI small body O-Ring
Crossover Valve Barrel O-rings

-011 V70 LP ports/hoses
Some Halcyon Stem O-rings
LPI Barb (Softer is better, Do not overtighten)

-010 V70 LP Hose Second Stage side
Stem O-Rings

-006 V70 LPI Barrel O-Ring

-003 V70 HP Spool

[Jack Hammer]

Good info, thanks Tom!