Rigid Coupling
Product Features
- RMC’s stainless steel rigid couplings are manufactured in alloy grade 304 and 316.
- RMC’s stainless steel couplings feature a hygienic polished finish, offering an exceptional aesthetic appearance and a consistent surface texture. This design enhances cleanability and significantly reduces the risk of microbial bacteria accumulation.
- Among metallic electrical raceway options, stainless steel offers the highest corrosion resistance, along with exceptional strength and temperature performance.
- RMC offers stainless rigid couplings in both 304 and 316 grades, with 316 providing superior corrosion resistance in chloride, sulfide, and marine environments due to its higher nickel content and the inclusion of molybdenum.
- Both 304 and 316 stainless steel offer excellent strength and temperature performance, with 316 providing slightly higher heat tolerance, up to 1550°F.
- Each length of RMC stainless steel conduit is supplied with one straight threaded (NPS) UL-listed coupling.
Certifications
- UL6A
- UL File #E542725
- CSA C22.2 NO 18.1
- NEC Article 314
Applications
- RMC’s stainless steel rigid couplings are designed for use with RMC stainless steel conduit or other threaded connections in electrical raceway applications.
- RMC’s stainless steel rigid couplings excel in demanding environments such as marine areas, chemical processing facilities, and food processing plants requiring rigorous chemical washdowns. These couplings provide superior corrosion resistance, reducing the need for frequent maintenance and replacement.
| Part Number (304) | Part Number (316) | Trade size in. | Trade size mm | Inside Diameter, in. | Inside Diameter, mm | Outside Diameter, in. (B) | Outside Diameter, mm (B) | Length of Coupling (in.) (A) | Length of Coupling (mm) (A) | Weight per Coupling (LB) |
|---|---|---|---|---|---|---|---|---|---|---|
| SR4CP05 | SR6CP05 | 1/2" | 16 | 0.84 | 21.34 | 1.08 | 27.43 | 1.66 | 42.16 | 0.2 |
| SR4CP07 | SR6CP07 | 3/4" | 21 | 1.05 | 26.67 | 1.33 | 33.78 | 1.67 | 42.42 | 0.28 |
| SR4CP10 | SR6CP10 | 1" | 27 | 1.315 | 33.4 | 1.56 | 39.62 | 2.0 | 50.8 | 0.37 |
| SR4CP12 | SR6CP12 | 1-1/4" | 35 | 1.66 | 42.16 | 1.95 | 49.53 | 2.06 | 52.32 | 0.56 |
| SR4CP15 | SR6CP15 | 1-1/2" | 41 | 1.9 | 48.26 | 2.22 | 56.39 | 2.09 | 53.09 | 0.71 |
| SR4CP20 | SR6CP20 | 2" | 53 | 2.375 | 60.33 | 2.75 | 69.850 | 2.16 | 54.86 | 1.05 |
| SR4CP25 | SR6CP25 | 2-1/2" | 63 | 2.875 | 73.03 | 3.25 | 83.82 | 3.22 | 81.79 | 2.13 |
| SR4CP30 | SR6CP30 | 3" | 78 | 3.5 | 88.9 | 3.9 | 99.06 | 3.33 | 84.58 | 2.42 |
| SR4CP40 | SR6CP40 | 4" | 103 | 4.5 | 114.3 | 5 | 127 | 3.55 | 90.17 | 4.2 |
