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Butt Weld Connector - Stainless Steel Compression Fitting for plastic tubing, pipe coupling, and plumbing unions.
Metric and Imperial sizes available (see Size Chart). Our fittings are compatible with other brands such as Swagelok and Parker. Please see our catalog for other types of fittings.
| Specifications |
|
| Body Material |
316 Stainless Steel
Nut (NTC) is Silver Plated
Back Ferrule (BFC) is surface hardened
|
| Operating Temperature |
-425°F to 600°F (-253°C to 315°C)
|
| Compatibility |
Swagelok®, Parker A-Lok, Let-Lock, Yor-Lock
|
| Service |
Steam, Air, Water
Oil, Gasoline, Natural Gas
Most solvents and acids that are compatible with 316SS
|
| Pressure |
| Tube (OD) |
Maximum Pressure (PSI at 72°F) |
| 1/16" |
|
10,000 |
| 1/8" |
2mm |
8,800 |
| 3/16" |
4mm |
5,500 |
| 1/4" |
6mm |
4,200 |
| 5/16" |
8mm |
3,300 |
| 3/8" |
10mm |
2,800 |
| 1/2" |
12mm |
2,500 |
| 5/8" |
16mm |
2,300 |
| 3/4" |
18mm |
2,100 |
| 1" |
20mm |
1,900 |
| Strength Testing |
In the strength test, STC Fittings out performed Tubes, where Tubes failed before STC Fittings when pressures were raised beyond the recommended Maximum Pressure.
|
|
| Dimensions |
| Tube Size (OD) |
Pipe Size |
Part No. |
A |
B |
C |
D |
E |
F |
G |
H |
I |
| 1/8" | 1/8" | BWC 1/8X1/8 | 30.4 | 23.8 | 12.7 | 10.3 | 12 | 3 | 3.18 | 12 | 10 |
| 3/16" | 1/8" | BWC 3/16X1/8 | 31.2 | 23.8 | 13.7 | 10.3 | 12 | 3 | 4.76 | 12 | 10 |
| 1/4" | 1/8" | BWC 1/4X1/8 | 32.8 | 25.4 | 15.2 | 10.3 | 12 | 5 | 6.35 | 14 | 10 |
| 1/4" | 1/4" | BWC 1/4X1/4 | 37.8 | 30.5 | 15.2 | 13.7 | 14 | 5 | 6.35 | 14 | 13 |
| 3/8" | 1/4" | BWC 3/8X1/4 | 38.6 | 32.5 | 16.8 | 13.7 | 17 | 8 | 9.53 | 17 | 13 |
| 3/8" | 3/8" | BWC 3/8X3/8 | 39.8 | 32.5 | 16.8 | 17.1 | 22 | 8 | 9.53 | 17 | 14 |
| 3/8" | 1/2" | BWC 3/8X1/2 | 46.2 | 38.8 | 16.8 | 21.3 | 22 | 8 | 9.53 | 17 | 17 |
| 3/8" | 3/4" | BWC 3/8X3/4 | 47.8 | 40.4 | 16.8 | 26.7 | 27 | 8 | 9.53 | 17 | 19 |
| 1/2" | 3/8" | BWC 1/2X3/8 | 45.2 | 33.3 | 22.8 | 17.1 | 22 | 10 | 12.7 | 22 | 14 |
| 1/2" | 1/2" | BWC 1/2X1/2 | 49.0 | 38.8 | 22.8 | 21.3 | 22 | 10 | 12.7 | 22 | 17 |
| 1/2" | 3/4" | BWC 1/2X3/4 | 50.5 | 40.4 | 22.8 | 26.7 | 27 | 10 | 12.7 | 22 | 19 |
| 5/8" | 1/2" | BWC 5/8X1/2 | 49.0 | 38.8 | 24.4 | 21.3 | 27 | 12 | 15.9 | 27 | 17 |
| 3/4" | 3/4" | BWC 3/4X3/4 | 50.5 | 40.4 | 24.4 | 26.7 | 27 | 15 | 19.1 | 30 | 19 |
| 1" | 1" | BWC 1X1 | 62.2 | 50.0 | 31.2 | 33.4 | 35 | 21 | 25.4 | 38 | 22 |
| Tube Size (OD) |
Pipe Size |
Part No. |
A |
B |
C |
D |
E |
F |
G |
H |
I |
| 4mm | 1/8" | BWC 4X1/8 | 31.2 | 24.6 | 13.7 | 11.3 | 12 | 3 | 4 | 12 | 10 |
| 6mm | 1/8" | BWC 6X1/8 | 32.8 | 25.4 | 15.3 | 11.3 | 12 | 5 | 6 | 14 | 10 |
| 6mm | 1/4" | BWC 6X1/4 | 37.9 | 30.5 | 15.3 | 13.7 | 14 | 5 | 6 | 14 | 13 |
| 8mm | 1/8" | BWC 8X1/8 | 34.2 | 26.7 | 16.2 | 11.3 | 14 | 6 | 8 | 17 | 10 |
| 8mm | 1/4" | BWC 8X1/4 | 38.7 | 31.2 | 16.2 | 13.7 | 14 | 6 | 8 | 17 | 13 |
| 8mm | 1/2" | BWC 8X1/2 | 46.5 | 38.1 | 17.0 | 21.3 | 22 | 8 | 8 | 17 | 17 |
| 10mm | 1/4" | BWC 10X1/4 | 40.9 | 33.3 | 17.2 | 13.7 | 17 | 8 | 10 | 19 | 13 |
| 10mm | 3/8" | BWC 10X3/8 | 43.4 | 33.3 | 22.8 | 17.1 | 22 | 10 | 10 | 22 | 14 |
| 10mm | 1/2" | BWC 10X1/2 | 46.5 | 38.9 | 17.2 | 21.3 | 22 | 8 | 10 | 19 | 17 |
| 12mm | 1/4" | BWC 12X1/4 | 43.4 | 34.0 | 22.8 | 13.7 | 22 | 8 | 12 | 22 | 13 |
| 12mm | 3/4" | BWC 12X3/4 | 43.4 | 38.9 | 22.8 | 17.1 | 22 | 10 | 12 | 22 | 14 |
| 12mm | 1/2" | BWC 12X1/2 | 49.0 | 38.9 | 22.8 | 21.3 | 22 | 10 | 12 | 22 | 17 |
|
Dimensions for Reference Use Only: Imperial fittings in mm, Metric fittings in mm, U.S.O. |
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