Open: $6.5740 USD/lb
10/16/2026
Close: $6.5115 USD/lb
10/15/2026
COMEX Aluminum
Latest: $2.5795 USD/lb
10/01/2026
Previous: $2.5932 USD/lb
09/01/2026
COMEX
CU
6.5740
AL
2.5795
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Steel Boxes, Covers, & Accessories

4" SQ CONC SLAB BX 3-1/2"D 1/2&3/4KO RED p-52181-SPKRR 52181-SPKRR

Southwire #: 52181-SPKRR Model #: 52181-SPKRR
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4 SQ CONCRETE BX MNT TABS RED 3-1/2 IN

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Features & Benefits

  • External tabs allow installer to nail/screw boxes to forms for stability during concrete pour
  • Labor saving design eliminates need to install extension rings to accommodate deeper devices
  • Combination Phillips/Slotted screw heads.
  • UL, RoHS Compliant

Specifications

Model # 52181-SPKRR 52181-SPKRR
UPC # 785592127310 785592127310
Product Height 3.5 8.89 inch cm
Product Width 4.0 10.16 inch cm
Product Weight 1.1 0.50 lbs kg
Material Powder Coated Galvanized Steel Powder Coated Galvanized Steel
Cubic Capacity 50.0 (819.4) 50.0 (819.4)
Standard Package 25 25
Bottom Knockouts (2) 1/2", (2) 3/4" (2) 1/2", (2) 3/4"
Side Knockouts (8) 3/4" (8) 3/4"
Color Red Red

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