4 Inch Square Junction Box 2-1/8 Inch Deep Drawn With Conduit Knockouts Red 52171-SVTRED (pack of 25)

About:

This refers to the dimensions of the junction box. It’s a square box with each side measuring 4 inches.
This specifies the depth of the junction box. It means that the interior space of the box, from the bottom to the top, is 2-1/8 inches deep.
These are pre-punched holes or knockouts on the sides of the junction box that allow conduits (metal or plastic tubing used to protect and route electrical wiring) to be attached to the box.

Also Known As:

4″ Square Electrical Box, Electrical Junction Box, 4 Inch Square Safety Equipment Enclosure, Square Junction Box, Junction Box.

Specification:

Type: Square Junction Box
Material: Powder Coated Galvanized Steel
Product Height: 2.13 Inch
Product Width: 4.0 Inch
Color: Red
UPC: 785592981639

Features:

Drawn construction with airtight knockouts and mounting/nail holes
Cover mounting screws included with plenum cover
Painted red boxes are used for life safety wireway identification
Combination Phillips/Slotted screw heads.