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How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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45° Flared Fittings for Copper and Brass Tubing
- Temperature Range: -65° to 250° F
- Tubing: Use with seamless brass and copper that meets ASTM B280
No sleeve is required to assemble these fittings, which makes for a faster, more convenient installation compared to 37° flared fittings. They require a nut (sold separately) for each tube end. Fittings are also known as refrigeration and SAE fittings. They are brass for good corrosion resistance.
Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.
Straight Reducers, Tube
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water
- Specifications Met: SAE J512, SAE J513, UL Listed
For Tube (A) | For Tube (B) | Each | |||||||
|---|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | OD | Wall Thick. | Material | Max. Pressure | 1-9 | 10-49 | 50-Up | |
| 3/8" | 0.032" | 1/4" | 0.03" | Brass | 1,000 psi @ 72° F | 000000000 | 00000 | 00000 | 00000 |
| 3/8" | 0.032" | 5/16" | 0.032" | Brass | 1,000 psi @ 72° F | 000000000 | 0000 | 0000 | 0000 |
| 1/2" | 0.032" | 1/4" | 0.03" | Brass | 750 psi @ 72° F | 000000000 | 00000 | 0000 | 0000 |
| 1/2" | 0.032" | 3/8" | 0.032" | Brass | 750 psi @ 72° F | 000000000 | 00000 | 0000 | 0000 |
| 5/8" | 0.035" | 3/8" | 0.032" | Brass | 650 psi @ 72° F | 000000000 | 00000 | 00000 | 0000 |
| 5/8" | 0.035" | 1/2" | 0.032" | Brass | 650 psi @ 72° F | 000000000 | 00000 | 00000 | 00000 |
Inline Tee Reducers, Tube
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water
- Specifications Met: SAE J512, SAE J513, UL Listed
Inline tees are also known as branch tees.
Nuts
(A) Short Nut
(B) Short Nut
(A) Long Nut
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water; except nuts for 1" tube OD are not for use with fuel oil
- Specifications Met: SAE J512, SAE J513, UL Listed; except nuts for 1" tube OD meet SAE J512 and SAE J513 only
For Tube | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Lg. | 1-19 | 20-99 | 100-Up | ||
Short Nuts  | |||||||||
| A | 1/4" | 0.049" | Brass | 1,400 psi @ 72° F | 3/4" | 000000000 | 00000 | 00000 | 00000 |
| A | 5/16" | 0.049" | Brass | 1,200 psi @ 72° F | 7/8" | 000000000 | 0000 | 0000 | 0000 |
| A | 3/8" | 0.032" | Brass | 1,000 psi @ 72° F | 29/32" | 000000000 | 0000 | 0000 | 0000 |
| A | 3/8" | 0.065" | Brass | 1,000 psi @ 72° F | 1" | 000000000 | 0000 | 0000 | 0000 |
| A | 1/2" | 0.032" | Brass | 750 psi @ 72° F | 1" | 000000000 | 0000 | 0000 | 0000 |
| A | 1/2" | 0.083" | Brass | 750 psi @ 72° F | 1 1/8" | 000000000 | 0000 | 0000 | 0000 |
| A | 5/8" | 0.035" | Brass | 650 psi @ 72° F | 1 1/16" | 000000000 | 0000 | 0000 | 0000 |
| A | 5/8" | 0.095" | Brass | 650 psi @ 72° F | 1 5/16" | 000000000 | 0000 | 0000 | 0000 |
| B | 1/4" | 0.03" | Brass | 1,400 psi @ 72° F | 5/8" | 00000000 | 0000 | 0000 | 0000 |
| B | 1/2" | 0.032" | Brass | 750 psi @ 72° F | 27/32" | 000000000 | 0000 | 0000 | 0000 |
| B | 5/8" | 0.035" | Brass | 650 psi @ 72° F | 31/32" | 000000000 | 0000 | 0000 | 0000 |
Long Nuts | |||||||||
| A | 1/4" | 0.049" | Brass | 1,400 psi @ 72° F | 15/16" | 000000000 | 0000 | 0000 | 0000 |
| A | 5/16" | 0.049" | Brass | 1,200 psi @ 72° F | 1 1/8" | 000000000 | 0000 | 0000 | 0000 |
| A | 3/8" | 0.065" | Brass | 1,000 psi @ 72° F | 1 5/16" | 000000000 | 0000 | 0000 | 0000 |
| A | 1/2" | 0.083" | Brass | 750 psi @ 72° F | 1 5/8" | 000000000 | 0000 | 0000 | 0000 |
| A | 5/8" | 0.095" | Brass | 650 psi @ 72° F | 1 7/8" | 000000000 | 00000 | 00000 | 0000 |