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Gaskets for 37° Flared Tube Fittings
Gasket
Threadlocker-Coated Gasket
Prevent leaks from temperature fluctuations and vibration that can loosen 37° flared tube fittings. In general, you should match your gasket material to your fitting material. But, if you have a brass fitting, you can use a copper gasket.
Gaskets without a coating are best for fittings that are exposed to harsh chemicals, such as antifreeze, which can dissolve the threadlocker coating.
Threadlocker-coated gaskets offer a more secure hold than uncoated gaskets, so they’re best for areas with high vibration.
For technical drawings and 3-D models, click on a part number.
Thread | Temperature, °F | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Dash Size | Size | Type | Thickness | Maximum Pressure, psi | Min. | Max. | Each | |
304 Stainless Steel | |||||||||
| 1/4" | 04 | 7/16"-20 | UN/UNF (JIC) | 0.183" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (JIC) | 0.205" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (JIC) | 0.26" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (JIC) | 0.268" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (JIC) | 0.274" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 1" | 16 | 1 5/16"-12 | UN/UNF (JIC) | 0.285" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 1 1/4" | 20 | 1 5/8"-12 | UN/UNF (JIC) | 0.335" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
| 1 1/2" | 24 | 1 7/8"-16 | UN/UNF (JIC) | 0.351" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
| 2" | 32 | 2 1/2"-12 | UN/UNF (JIC) | 0.43" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
Threadlocker-Coated 304 Stainless Steel—Orange | |||||||||
| 1/4" | 04 | 7/16"-20 | UN/UNF (JIC) | 0.183" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (JIC) | 0.205" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (JIC) | 0.26" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (JIC) | 0.268" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (JIC) | 0.274" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 1" | 16 | 1 5/16"-12 | UN/UNF (JIC) | 0.285" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 1 1/4" | 20 | 1 5/8"-12 | UN/UNF (JIC) | 0.335" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 1 1/2" | 24 | 1 7/8"-16 | UN/UNF (JIC) | 0.351" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 2" | 32 | 2 1/2"-12 | UN/UNF (JIC) | 0.43" | 20,000 | -40° | 300° | 00000000 | 00000 |
316 Stainless Steel | |||||||||
| 3/16" | 03 | 3/8"-16 | UN/UNF (JIC) | 0.145" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 1/4" | 04 | 7/16"-20 | UN/UNF (JIC) | 0.183" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 5/16" | 05 | 1/2"-20 | UN/UNF (JIC) | 0.188" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (JIC) | 0.205" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (JIC) | 0.26" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (JIC) | 0.268" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (JIC) | 0.274" | 20,000 | Not Rated | 2500° | 00000000 | 0000 |
| 7/8" | 14 | 1 3/16"-12 | UN/UNF (JIC) | 0.28" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
| 1" | 16 | 1 5/16"-12 | UN/UNF (JIC) | 0.285" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
| 1 1/4" | 20 | 1 5/8"-12 | UN/UNF (JIC) | 0.335" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
| 1 1/2" | 24 | 1 7/8"-16 | UN/UNF (JIC) | 0.351" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
| 2" | 32 | 2 1/2"-12 | UN/UNF (JIC) | 0.43" | 20,000 | Not Rated | 2500° | 00000000 | 00000 |
Threadlocker-Coated 316 Stainless Steel—Black | |||||||||
| 3/16" | 03 | 3/8"-16 | UN/UNF (JIC) | 0.145" | 20,000 | -40° | 1200° | 00000000 | 0000 |
| 1/4" | 04 | 7/16"-20 | UN/UNF (JIC) | 0.183" | 20,000 | -40° | 1200° | 00000000 | 0000 |
| 5/16" | 05 | 1/2"-20 | UN/UNF (JIC) | 0.188" | 20,000 | -40° | 1200° | 00000000 | 0000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (JIC) | 0.205" | 20,000 | -40° | 1200° | 00000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (JIC) | 0.26" | 20,000 | -40° | 1200° | 00000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (JIC) | 0.268" | 20,000 | -40° | 1200° | 00000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (JIC) | 0.274" | 20,000 | -40° | 1200° | 00000000 | 0000 |
| 7/8" | 14 | 1 3/16"-12 | UN/UNF (JIC) | 0.28" | 20,000 | -40° | 1200° | 00000000 | 00000 |
| 1" | 16 | 1 5/16"-12 | UN/UNF (JIC) | 0.285" | 20,000 | -40° | 1200° | 00000000 | 00000 |
| 1 1/4" | 20 | 1 5/8"-12 | UN/UNF (JIC) | 0.335" | 20,000 | -40° | 1200° | 00000000 | 0000 |
| 1 1/2" | 24 | 1 7/8"-16 | UN/UNF (JIC) | 0.351" | 20,000 | -40° | 1200° | 00000000 | 00000 |
| 2" | 32 | 2 1/2"-12 | UN/UNF (JIC) | 0.43" | 20,000 | -40° | 1200° | 00000000 | 00000 |
Threadlocker-Coated 316 Stainless Steel—Green | |||||||||
| 3/16" | 03 | 3/8"-16 | UN/UNF (JIC) | 0.145" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 1/4" | 04 | 7/16"-20 | UN/UNF (JIC) | 0.183" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 5/16" | 05 | 1/2"-20 | UN/UNF (JIC) | 0.188" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (JIC) | 0.205" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (JIC) | 0.26" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (JIC) | 0.268" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (JIC) | 0.274" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 7/8" | 14 | 1 3/16"-12 | UN/UNF (JIC) | 0.28" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 1" | 16 | 1 5/16"-12 | UN/UNF (JIC) | 0.285" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 1 1/4" | 20 | 1 5/8"-12 | UN/UNF (JIC) | 0.335" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 1 1/2" | 24 | 1 7/8"-16 | UN/UNF (JIC) | 0.351" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 2" | 32 | 2 1/2"-12 | UN/UNF (JIC) | 0.43" | 20,000 | -40° | 300° | 00000000 | 00000 |
Aluminum | |||||||||
| 1/4" | 04 | 7/16"-20 | UN/UNF (JIC) | 0.183" | 3,000 | Not Rated | 1200° | 00000000 | 0000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (JIC) | 0.205" | 3,000 | Not Rated | 1200° | 00000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (JIC) | 0.26" | 3,000 | Not Rated | 1200° | 00000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (JIC) | 0.268" | 3,000 | Not Rated | 1200° | 00000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (JIC) | 0.274" | 3,000 | Not Rated | 1200° | 00000000 | 0000 |
| 1" | 16 | 1 5/16"-12 | UN/UNF (JIC) | 0.285" | 3,000 | Not Rated | 1200° | 00000000 | 0000 |
Copper | |||||||||
| 3/16" | 03 | 3/8"-16 | UN/UNF (JIC) | 0.145" | 20,000 | -420° | 800° | 00000000 | 0000 |
| 1/4" | 04 | 7/16"-20 | UN/UNF (JIC) | 0.183" | 20,000 | -420° | 800° | 00000000 | 0000 |
| 5/16" | 05 | 1/2"-20 | UN/UNF (JIC) | 0.188" | 20,000 | -420° | 800° | 00000000 | 0000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (JIC) | 0.205" | 20,000 | -420° | 800° | 00000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (JIC) | 0.26" | 20,000 | -420° | 800° | 00000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (JIC) | 0.268" | 20,000 | -420° | 800° | 00000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (JIC) | 0.274" | 20,000 | -420° | 800° | 00000000 | 0000 |
| 7/8" | 14 | 1 3/16"-12 | UN/UNF (JIC) | 0.28" | 20,000 | -420° | 800° | 00000000 | 0000 |
| 1" | 16 | 1 5/16"-12 | UN/UNF (JIC) | 0.285" | 20,000 | -420° | 800° | 00000000 | 00000 |
| 1 1/4" | 20 | 1 5/8"-12 | UN/UNF (JIC) | 0.335" | 20,000 | -420° | 800° | 00000000 | 00000 |
| 1 1/2" | 24 | 1 7/8"-16 | UN/UNF (JIC) | 0.351" | 20,000 | -420° | 800° | 00000000 | 00000 |
| 2" | 32 | 2 1/2"-12 | UN/UNF (JIC) | 0.43" | 20,000 | -420° | 800° | 00000000 | 00000 |
Threadlocker-Coated Copper—Purple | |||||||||
| 3/16" | 03 | 3/8"-16 | UN/UNF (JIC) | 0.145" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 1/4" | 04 | 7/16"-20 | UN/UNF (JIC) | 0.183" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 5/16" | 05 | 1/2"-20 | UN/UNF (JIC) | 0.188" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (JIC) | 0.205" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (JIC) | 0.26" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (JIC) | 0.268" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (JIC) | 0.274" | 20,000 | -40° | 300° | 00000000 | 0000 |
| 7/8" | 14 | 1 3/16"-12 | UN/UNF (JIC) | 0.28" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 1" | 16 | 1 5/16"-12 | UN/UNF (JIC) | 0.285" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 1 1/4" | 20 | 1 5/8"-12 | UN/UNF (JIC) | 0.335" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 1 1/2" | 24 | 1 7/8"-16 | UN/UNF (JIC) | 0.351" | 20,000 | -40° | 300° | 00000000 | 00000 |
| 2" | 32 | 2 1/2"-12 | UN/UNF (JIC) | 0.43" | 20,000 | -40° | 300° | 00000000 | 00000 |
Gaskets for 45° Flared Tube Fittings
Gasket
Threadlocker-Coated Gasket
Stop leaks from variations in temperature and vibration that can loosen 45° flared tube fittings. Made of copper, these gaskets are for use with brass fittings.
Gaskets without a coating are best for fittings that are exposed to harsh chemicals, such as antifreeze, which can dissolve the threadlocker coating.
Threadlocker-coated gaskets offer a more secure hold than uncoated gaskets, so they’re best for areas with high vibration.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Dash Size | Size | Type | Thickness | Maximum Pressure, psi | Temperature Range, °F | Color | Each | |
Copper | |||||||||
| 1/4" | 04 | 7/16"-20 | UN/UNF (SAE 45°) | 0.16" | 20,000 | -420° to 800° | __ | 0000000 | 00000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (SAE 45°) | 0.22" | 20,000 | -420° to 800° | __ | 0000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (SAE 45°) | 0.235" | 20,000 | -420° to 800° | __ | 0000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (SAE 45°) | 0.255" | 20,000 | -420° to 800° | __ | 0000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (SAE 45°) | 0.265" | 20,000 | -420° to 800° | __ | 0000000 | 0000 |
Threadlocker-Coated Copper | |||||||||
| 1/4" | 04 | 7/16"-20 | UN/UNF (SAE 45°) | 0.165" | 20,000 | -40° to 300° | Purple | 0000000 | 0000 |
| 3/8" | 06 | 9/16"-18 | UN/UNF (SAE 45°) | 0.225" | 20,000 | -40° to 300° | Purple | 0000000 | 0000 |
| 1/2" | 08 | 3/4"-16 | UN/UNF (SAE 45°) | 0.24" | 20,000 | -40° to 300° | Purple | 0000000 | 0000 |
| 5/8" | 10 | 7/8"-14 | UN/UNF (SAE 45°) | 0.26" | 20,000 | -40° to 300° | Purple | 0000000 | 0000 |
| 3/4" | 12 | 1 1/16"-12 | UN/UNF (SAE 45°) | 0.27" | 20,000 | -40° to 300° | Purple | 0000000 | 0000 |