Steel RMC (rigid metal conduit) coupling is made from the same material of straight RMC conduit, and it connects the same size of the conduit together. Both the outside and inside surfaces are galvanized for corrosion resistance.
Available size
| Trade size | OD (mm) | Length (mm) | Ref. No. |
|---|---|---|---|
| 1/2″ | 25.7 | 41.3 | C1801 |
| 3/4″ | 31.8 | 41.7 | C1802 |
| 1″ | 38.7 | 50.0 | C1803 |
| 1-1/4″ | 47.5 | 51.6 | C1804 |
| 1-1/2″ | 54.7 | 52.4 | C1805 |
| 2″ | 67.3 | 54.0 | C1806 |
| 2-1/2″ | 82.6 | 81.0 | C1807 |
| 3″ | 98.3 | 84.1 | C1808 |
| 4″ | 123.8 | 89.3 | C1809 |
| 5″ | 152.4 | 100.0 | C1810 |
| 6″ | 182.9 | 108.0 | C1811 |
Note:
1. OD tolerance: OD 1/2″ ~ 1″, – 0.40mm (0.016″); OD 1-1/4″ ~ 6″, -1%.
2. All couplings shall have straight-tapped threads.
