How to measure a drain plug
Pipe
thread plugs are tapered and do not need a gasket to seal
We need the thread diameter and thread pitch or threads
per inch (TPI)
Take your plug to a hardware store and find a metric
or inch nut that fits
Or measure your plug using the charts below
Finally you
may send us your plug and we will measure and match it
| Size |
Pitch
Course |
TPI
Course |
Pitch
Fine |
TPI
Fine |
Pitch
Extra Fine |
TPI
Extra Fine |
| 8mm |
1.25 |
20 |
1.00 |
25 |
|
|
| 10mm |
1.50 |
17 |
1.25 |
20 |
1.00 |
25 |
| 12mm |
1.75 |
14.5 |
1.50 |
17 |
1.25 |
20 |
| 14mm |
2.00 |
12.5 |
1.50 |
17 |
1.25 |
20 |
| 16mm |
2.00 |
12.5 |
1.50 |
17 |
1.25 |
20 |
| 18mm |
2.50 |
10 |
1.50 |
17 |
|
|
| 20mm |
2.50 |
10 |
2.0 |
12.5 |
1.50 |
|
| 22mm |
2.50 |
10 |
2.0 |
12.5 |
|
|
| 24mm |
3.00 |
8.5 |
2.0 |
12.5 |
|
|
| 25mm |
|
|
|
|
1.50 |
|
| 27mm |
3.00 |
8.5 |
|
|
|
|
| 30mm |
3.50 |
7 |
|
|
|
|
| 33mm |
3.50 |
7 |
|
|
|
|
| 36mm |
4.00 |
6 |
|
|
|
|
TPI = Threads Per Inch
| Inch |
Metric |
Inches |
Millimeters |
| . |
M6 |
.2362 |
6.00 |
| 1/4 |
. |
.2500 |
6.35 |
| 5/16 |
. |
.3125 |
7.93 |
| . |
M8 |
.3149 |
8.00 |
| 3/8 |
. |
.3750 |
9.52 |
| . |
M10 |
.3937 |
10.00 |
| . |
M12 |
.4724 |
12.00 |
| 1/2 |
. |
.5000 |
12.70 |
| 5/8 |
. |
.625 |
15.87 |
| . |
M16 |
.6299 |
16.00 |
| 3/4 |
. |
.7500 |
19.05 |
| . |
M20 |
.7874 |
20.00 |
| 7/8 |
. |
.8750 |
22.22 |
| . |
M24 |
.9448 |
24.00 |
| 1 |
. |
1.000 |
25.40 |
