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By Raco 

Catalog ID: 257PL

By Raco
Catalog ID:  257PL
4-11/16 in. Plenum Box, 2-1/8 in. Deep, Eleven 1/2 in. and Six 3/4 in. Knockouts
  • Available in 4 in. square, 4-11/16 in. square and 4 in. octagon models
  • Airtight knockouts
  • To maintain plenum seal, boxes do not have ground screw holes
  • Drawn steel construction
  • UL Listed

Product Details


Application Maintain code-compliance in plenum areas with RACO’s airtight Plenum boxes. Gasketed covers and leak-free KO’s meet the most rigid code requirements.
Drawn or Welded Drawn
Knockouts 1/2 in;3/4 in
Type Box
UPC 050169994337


Cubic Capacity 42
Depth 2.125 in

Certifications and Compliance

Certified Listed UL Listed


Carton Quantity 25
Pallet Quantity 1500

Resources and Downloads


Sales Drawings

Terms and Conditions