AN fittings & hinges
AN819 Coupling Sleeve
The sleeve that sits behind the flare, under the AN818 nut.
- StandardAN819 (= MS20819)
- FormSleeve for flared tube
Where to buy
AmericaDistributor coming soonOur partner for this region is on its way
EuropeDistributor coming soonOur partner for this region is on its way
OceaniaDistributor coming soonOur partner for this region is on its way
More distributors
AmericaMore distributors coming soon
EuropeMore distributors coming soon
OceaniaMore distributors coming soon
The dash number is the tube outside diameter in sixteenths (−4 = 1/4"). A "D" suffix is aluminum, "J" stainless, no suffix steel, as the listing's columns show.
Per the listing, black sleeves are steel and blue ones aluminum. Pairs with the AN818 nut.
Specifications
| Standard | AN819 (= MS20819) |
|---|---|
| Form | Sleeve for flared tube |
Source: a distributor's listing, checked 2026-09-30.
Sizes listed 9 rows
| Steel | Aluminum | Stainless | Tube OD (in.) |
|---|---|---|---|
| 2 | 2D | 2J | 1/8 |
| 3 | 3D | 3J | 3/16 |
| 4 | 4D | 4J | 1/4 |
| 5 | 5D | 5J | 5/16 |
| 6 | 6D | 6J | 3/8 |
| 8 | 8D | 8J | 1/2 |
| 10 | 10D | 10J | 5/8 |
| 12 | 12D | 12J | 3/4 |
| 20 | 20D | 20J | 1-1/4 |
Questions people actually ask
Where can I buy the AN819 Coupling Sleeve?
A distributor we checked lists it in the Americas. The link to its page, with the live price and stock, opens when the partnership does.
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