What size knockout plug do I need?
First, determine the size of the missing knockout hole and subtract 3/8″ to figure out what size knockout plug you’ll need. For example, if you have a 7/8″ hole, you’ll need a 1/2″ knockout plug. Next, go buy some knockout plugs.
What size are knockout holes in electrical box?
Stimpson offers Electrical Knockout Plugs in six basic sizes: 1/2”, 3/4”, 1”, 1-1/4”, 1-1/2”, and 2”. Variations for special situations are also available.
What are knockout plugs?
Knockout plugs are often used to connect dishwashers to garbage disposals. A knockout plug is a removable piece of material that blocks an unused orifice. Each knockout plug is typically stamped from the same type of material as the tube or hole it blocks.
What size is a 4 knockout?
| ALL SIZES ARE INCHES | KNOCK OUT SIZE | |
|---|---|---|
| 2-1/2 | 8 | 2.969 |
| 3 | 8 | 3.594 |
| 3-1/2 | 8 | 4.123 |
| 4 | 8 | 4.641 |
What is a 1/2 inch knockout?
The nominal knockout diameter for 1/2 inch conduit is 0.875 inches.
How do you seal knockout holes?
Standard knockout plugs have crimped prongs on the back. The idea is to press or hammer a plug into place from outside the box. The prongs compress and press inward to fit through the hole, then spring back into place to keep the plug snug against the box and virtually impossible to remove.
What size is a 1/2 electrical knockout?
0.875 inches
The nominal knockout diameter for 1/2 inch conduit is 0.875 inches.
What size is a 3/4 electrical knockout?
1.109 inches
The nominal knockout diameter for 3/4 inch conduit is 1.109 inches.
What size hole is a 3/4 inch knockout?
3/4″ Trade Size conduit, drill using a 1 1/8″ hole saw or 3/4″ conduit knockout punch (1.115″ or 28.3mm).
Where is the knockout plug on a Whirlpool dishwasher?
Inspect the connection point at the disposal to ensure the knockout plug has been removed. The knockout plug is recessed into the inlet and is not visible when looking at if from the side. Insert a pencil into the inlet and feel for the knockout plug.
How do you remove a knockout plug?
To remove a knockout, position the tip of a regular, blade-tip screwdriver just inside the edge, on the side opposite the attachment points. That ought to partially dislodge the knockout, allowing you to remove it the rest of the way by twisting back and forth until the attachment points snap.
What size hole is a 3/4 knockout?
How do I know what size to order?
| Standard Conduit or Pipe Size (I.D.) | Actual O.D of Pipe | Actual Hole Size |
|---|---|---|
| 3/8″ | 0.675″ (17.15mm) | 0.718″ (18.24mm) |
| 1/2″ | 0.840″ (21.33mm) | 0.875″ (22.22mm) |
| 3/4″ | 1.050″ (26.67mm) | 1.125″ (28.57mm) |
| 1″ | 1.315″ (33.40mm) | 1.375″ (34.92mm) |