Thread data
Compression sizes and dimensions
Double ferrule compression fittings for instrument and process tube, sized by tube outside diameter. Unions, elbows, tees, bulkheads and male connectors are the same bodies as other Specport parts, with compression ports on the ends.
- Standard
- Double ferrule compression, tube OD
- Seals by
- Front and back ferrule bite on the tube
- Used for
- Instrument, process and hydraulic tube. Unions, elbows, tees, bulkheads and male connectors.
- Sizes
- 1/16 in to 25 mm
Compression dimensions
The dimensions we machine to. Pressure values are nominal working ratings for steel at room temperature.
| Size | Male | Female | Tube OD | Nut height | Ferrules | Tube | Make-up | Rated to |
|---|---|---|---|---|---|---|---|---|
| 1/16 in | Tube stub Ø1.59 mm | Compression, 1/16 in tube | 1.59 mm | 10.16 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 5,000 psi |
| 1/8 in | Tube stub Ø3.17 mm | Compression, 1/8 in tube | 3.17 mm | 11.94 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 5,000 psi |
| 3/16 in | Tube stub Ø4.76 mm | Compression, 3/16 in tube | 4.76 mm | 12.70 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 4,000 psi |
| 1/4 in | Tube stub Ø6.35 mm | Compression, 1/4 in tube | 6.35 mm | 14.22 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 4,000 psi |
| 5/16 in | Tube stub Ø7.94 mm | Compression, 5/16 in tube | 7.94 mm | 14.99 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 3,000 psi |
| 3/8 in | Tube stub Ø9.52 mm | Compression, 3/8 in tube | 9.52 mm | 15.75 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 3,000 psi |
| 1/2 in | Tube stub Ø12.70 mm | Compression, 1/2 in tube | 12.70 mm | 18.29 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 2,500 psi |
| 5/8 in | Tube stub Ø15.88 mm | Compression, 5/8 in tube | 15.88 mm | 19.81 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 2,000 psi |
| 3/4 in | Tube stub Ø19.05 mm | Compression, 3/4 in tube | 19.05 mm | 22.35 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 1,500 psi |
| 1 in | Tube stub Ø25.40 mm | Compression, 1 in tube | 25.40 mm | 26.67 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 1,000 psi |
| 3 mm | Tube stub Ø3.00 mm | Compression, 3 mm tube | 3.00 mm | 10.16 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 5,000 psi |
| 4 mm | Tube stub Ø4.00 mm | Compression, 4 mm tube | 4.00 mm | 11.18 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 5,000 psi |
| 6 mm | Tube stub Ø6.00 mm | Compression, 6 mm tube | 6.00 mm | 12.70 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 4,000 psi |
| 8 mm | Tube stub Ø8.00 mm | Compression, 8 mm tube | 8.00 mm | 14.22 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 4,000 psi |
| 10 mm | Tube stub Ø10.00 mm | Compression, 10 mm tube | 10.00 mm | 15.75 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 3,000 psi |
| 12 mm | Tube stub Ø12.00 mm | Compression, 12 mm tube | 12.00 mm | 17.53 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 3,000 psi |
| 16 mm | Tube stub Ø16.00 mm | Compression, 16 mm tube | 16.00 mm | 19.81 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 2,000 psi |
| 18 mm | Tube stub Ø18.00 mm | Compression, 18 mm tube | 18.00 mm | 21.34 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 1,500 psi |
| 22 mm | Tube stub Ø22.00 mm | Compression, 22 mm tube | 22.00 mm | 24.13 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 1,200 psi |
| 25 mm | Tube stub Ø25.00 mm | Compression, 25 mm tube | 25.00 mm | 26.67 mm | Front and back ferrule, 316 | Seamless or welded tube, fully annealed | 1-1/4 turns from finger tight | 1,000 psi |
Adapters with Compression
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