Gaskets for 37° Flared Tube Fittings

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.
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 | |
Threadlocker-Coated Copper—Purple | |||||||||
3/16" | 03 | 3/8"-16 | UN/UNF (JIC) | 0.145" | 20,000 | -40° | 300° | 00000000 | 00000 |
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

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.
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 | |
Threadlocker-Coated Copper | |||||||||
1/4" | 04 | 7/16"-20 | UN/UNF (SAE 45°) | 0.165" | 20,000 | -40° to 300° | Purple | 0000000 | 00000 |
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 |
Flexible Gasket Maker Sealants

Make gaskets that accommodate movement. Gasket makers are used in place of rubber, cork, and other traditional gasket materials for a form-in-place seal and make it easy to form irregular-shaped gaskets.
Container | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Manufacturer Model Number | Size, fl. oz. | Type | Max. Gap Size Filled | Begins to Harden, min. | Reaches Full Strength, hrs. | Temp. Range, °F | Color | Specifications Met | For Use On | Each | |
Loctite® Gasket Maker Sealants | |||||||||||
515 | 0.2 | Tube | 0.01" | 25 | 12 | -65° to 300° | Purple | UL Listed | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Cast Iron, Titanium | 0000000 | 00000 |
515 | 1.69 | Tube | 0.01" | 25 | 12 | -65° to 300° | Purple | UL Listed | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Cast Iron, Titanium | 0000000 | 00000 |
Flexible Gasket Maker Sealants in Cartridges

Make gaskets that accommodate movement. Use cartridges with a standard caulk gun for quick and easy dispensing. Gasket makers are used in place of rubber, cork, and other traditional gasket materials for a form-in-place seal and make it easy to form irregular-shaped gaskets.
Manufacturer Model Number | Container Size | Max. Gap Size Filled | Begins to Harden | Reaches Full Strength, hrs. | Temp. Range, °F | Color | Specifications Met | For Use On | Each | |
Loctite® Gasket Maker Sealants | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
515 | 10.1 fl. oz. | 0.01" | 25 min. | 12 | -65° to 300° | Purple | UL Listed | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Cast Iron, Titanium | 0000000 | 000000 |
Gasketing Adhesive Sticks

All the benefits of gasketing adhesive in a no-drip form. Gasket adhesives hold gaskets in place during assembly.
Certificates with a traceable lot number and product shelf life are available for these products. Download certificates from ORDER HISTORY after your order ships.
Manufacturer Model Number | Container Net Weight, oz. | Begins to Harden, min. | Reaches Full Strength, hrs. | Temp. Range, °F | Color | For Use On | Each | |
Loctite® Sticks | ||||||||
---|---|---|---|---|---|---|---|---|
534 | 0.67 | 10 | 24 | -65° to 300° | Purple | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Cast Iron, Titanium, Cork | 0000000 | 000000 |