Depending on regional terminology, this product may also be described as a metal back box with knockouts, metal switch box, metal socket box or, for galvanized versions, a GI box.
Key Features
Standard Fixed-Lug Structure
Conventional fixed mounting lugs provide defined fixing points for switches, sockets and compatible electrical accessories.
Pre-Formed Knockout Entries
Removable knockouts provide planned cable or conduit entry points. Their size, quantity and position depend on the selected box model.
Single-Gang and Multi-Gang Options
Existing square and rectangular formats cover different switch, socket and combined wiring accessory layouts.
Multiple Existing Specifications
Box dimensions, depth, sheet thickness and knockout layouts can first be selected from the existing M&K product range.
Available Product Specifications
This page represents a standard product series rather than one fixed box size. Final specifications should be confirmed according to the required wiring accessory, installation space and cable or conduit entry.
| Item | Available Direction |
|---|---|
| Product Type | Standard metal knockout box / metal switch and socket box |
| Fixing Structure | Standard fixed mounting lugs |
| Box Formats | Square, rectangular and combined layouts according to model |
| Gang Configuration | Single-gang and multi-gang options |
| Box Depth | Multiple existing depth options; other depths can be confirmed when required |
| Sheet Thickness | Available in different thicknesses according to the selected model |
| Knockout Layout | Side, base and rear knockout arrangements depending on model |
| Material and Finish | Steel material, thickness and surface finish confirmed by model |
| Typical Use | Switch, socket, cable entry, conduit entry and common building wiring installation |
Where the Standard Model Fits
- Switch and socket mounting: provides conventional fixed points for compatible wall-mounted wiring accessories.
- Single-device installation: square single-gang models support common individual switch or socket positions.
- Multi-gang arrangements: rectangular and combined box formats accommodate several wiring accessories in one layout.
- Cable or conduit entry: knockout positions can be selected according to the planned wiring direction.
How to Select a Suitable Model
- Confirm the accessory layout. Identify whether the installation requires a single-gang, multi-gang, square or rectangular box.
- Check the available installation space. Confirm the required external dimensions and box depth.
- Match the knockout arrangement. Provide the cable or conduit size together with the preferred entry position.
- Confirm the box construction. Check sheet thickness, fixed-lug position, material and surface finish.
- Share a reference when available. A drawing, sample, existing model number or clear product photo can speed up specification confirmation.
Existing Models and Custom Options
M&K maintains many established metal knockout box styles covering common gang configurations, dimensions, depths, sheet thicknesses and knockout layouts. We first check whether an existing model matches the requirement, helping avoid unnecessary product redevelopment.
Existing Model Selection
- Single-gang and multi-gang layouts
- Different square and rectangular formats
- Multiple box depths and sheet thicknesses
- Existing side, base and rear knockout arrangements
- Standard fixed-lug configurations
Customization When Required
- Box dimensions and depth
- Gang configuration
- Sheet thickness
- Knockout size, quantity and position
- Surface finish, logo, label and packaging
When to Choose a Different Knockout Box Structure
The standard fixed-lug model is suitable for conventional installations. Choose another M&K structure when the mounting or internal space requires additional support:
- Choose a metal knockout box with reinforced screw mounts when stronger fixing points are required.
- Choose a metal knockout box with connecting rod when the box structure requires connecting-rod support.
- Choose a deep metal knockout box with connecting rod when additional wiring space and thicker sheet metal are needed.
- Choose a metal knockout box with adjustable lug and brass standoff when adjustable accessory alignment or brass mounting support is required.
Frequently Asked Questions
What is a standard metal knockout box?
A standard metal knockout box is a conventional electrical box with fixed mounting lugs and removable knockout openings for cable or conduit entry. It is commonly used to mount switches, sockets and related wiring accessories.
Are single-gang and multi-gang boxes available?
Yes. M&K offers existing single-gang and multi-gang box formats, including different square, rectangular and combined layouts.
Which specifications should be confirmed before selection?
Confirm the box dimensions, depth, gang configuration, sheet thickness, knockout size and position, fixing structure, material and surface finish.
Can the box be customized if an existing model does not fit?
Yes. If no existing model matches, dimensions, depth, thickness, gang layout, knockout arrangement, finish and packaging can be confirmed from a drawing, sample or reference product.
Send Your Box Specification
Share the required box size, depth, gang configuration, sheet thickness, knockout layout and quantity. M&K will first check the existing model range and then confirm any additional specification requirements.
