4 Inch Square Junction Box 2-1/8 Inch Deep Drawn With Conduit Knockouts 52171-SDR (pack of 50)

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, meaning that the interior space of the box, from the bottom to the top, measures 2-1/8 inches deep.
This refers to the manufacturing process used to create the junction box.
These are pre-formed openings 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 connected 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: Galvanized Steel
Product Height: 2.13 Inch
Product Width: 4.0 Inch
UPC: 785592400796

Features:

Combination knockouts allow for greater wiring flexibility
Drawn design ideal for surface mounting.
Combination Phillips/Slotted screw heads.