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Catalog ID: 55171K

Catalog ID:  55171K
Extension ring for 4 In. Octagon Box, 2-1/8 in. Deep, 21 Cu. In., with Concentric, 1/2 & 3/4 in. KO (50-Pack)

Combination screw heads provide for faster installation, Self-tapping screws virtually eliminate stripping

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Product Details


Application Octagon boxes can be used in the installation of ceiling or wall lighting fixtures. Extension rings provide a means for adding additional cubic capacity.
Bracket Type No Bracket
Color Gray
Drawn or Welded Drawn
Gangable No
Knockouts 2 x 1/2 in, 2 x ½-3/4 in Comb ination
Knockouts - End 2 x ½-3/4in Combination
Knockouts - Side 2 x 1/2in
Material Steel
Number of Gang(s) 1-Gang
Plaster Ears No
Sub Brand tradeSELECT
Type Extension Ring
UPC 626463002254
Wiring System Conduit


Actual Depth 2.125 in
Raised Ground No
Weight 0.4 lb

Certifications and Compliance

Certified Listed CSA
Industry Standard(s) CSA Certified


Carton Quantity 50
Pallet Quantity 1800