Hubbell 4 x 4" Steel Extension Ring (2 ⅛", Concentric KO) - Pack of 40, Model 53171ER
Pickup available at IES - Mississauga
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This steel extension ring supports conduit installations in poured concrete floors, including high-rise construction on wooden or steel forms. Flat sides provide firm locknut contact, while external mounting ears and waxed fixture ears help with positioning and protect fixture threads from concrete. A removable top cover provides access for before-pour work.
Specifications
| Pack Quantity | 40 |
| Type | Extension ring |
| Application | Poured concrete decks (floors) in high-rise construction; installed on wooden or steel concrete forms so the box is flush with the concrete after form removal |
| Material | Steel |
| Construction | Drawn |
| Size | 4 in. |
| Depth | 2-1/8 in. (2.125 in.) |
| Volume | 30 cu. in. |
| Knockouts | 4 × 1/2 in.; 6 × 1/2–3/4 in. combination |
| End Knockouts | 4 × 1/2 in.; 2 × 1/2–3/4 in. combination |
| Side Knockouts | 4 × 1/2–3/4 in. combination |
| Wiring System | Conduit |
| Number of Gangs | 2 |
| Gangable | No |
| Bracket Type | No bracket |
| Plaster Ears | No |
| Raised Ground | No |
| Mounting and Fixture Features | External ears for nailing to wood forms; internal fixture ears with wax protection for threads |
| Top Cover | Removable for before-pour work |
| Weight | 0.6 lb |
| Certification | CSA Certified |
| UPC | 626463021064 |
