Gasket University Size Chart
Gasket
A gasket is a mechanical seal which fills the space between two or more surfaces needing to be joined. It is typically used to prevent leakage from, or into, the joined objects while under compression.Standard gaskets conform to the sizes set forth by the ASME, as shown below. It is most common to use the size below, but we also manufacture a lot of gaskets that are custom sizes and shapes. Call us for any of your custom gasket size needs.
Sizing for Standard 150# Ring Gaskets is as follows:
| Gasket (Pipe) Size | Inside Diameter (ID) | Outside Diameter (OD) |
| 1/2" | 27/32" | 1 7/8" |
| 3/4" | 1 1/16" | 2 1/4" |
| 1" | 1 5/16" | 2 5/8" |
| 1 1/4" | 1 21/32" | 3" |
| 1 1/2" | 1 29/32" | 3 3/8" |
| 2" | 2 3/8" | 4 1/8" |
| 2 1/2" | 2 7/8" | 4 7/8" |
| 3" | 3 1/2" | 5 3/8" |
| 3 1/2" | 4" | 6 3/8" |
| 4" | 4 1/2" | 6 7/8" |
| 5" | 5 9/16" | 7 3/4" |
| 6" | 6 5/8" | 8 3/4" |
| 8" | 8 5/8" | 11" |
| 10" | 10 3/4" | 13 3/8" |
| 12" | 12 3/4" | 16 1/8" |
| 14" | 14" | 17 3/4" |
| 16" | 16" | 20 1/4" |
| 18" | 18" | 21 5/8" |
| 20" | 20" | 23 3/8" |
| 24" | 24" | 28 1/4" |
| 30" | 30" | 34 3/4" |
| 36" | 36" | 41 1/4" |
Sizing for Standard 150# Full Face Gaskets is as follows:
| Gasket (Pipe) Size | Inside Diameter (ID) | Outside Diameter (OD) | Bolt Hole Qty. | Bolt Hole Diameter |
| 1/2" | 27/32" | 3-1/2" | 4 | 5/8" |
| 3/4" | 1 1/16" | 3 7/8" | 4 | 5/8" |
| 1" | 1 5/16" | 4 1/4" | 4 | 5/8" |
| 1 1/4" | 1 5/8" | 4 5/8" | 4 | 5/8" |
| 1 1/2" | 1 7/8" | 5" | 4 | 5/8" |
| 2" | 2 3/8" | 6" | 4 | 3/4" |
| 2 1/2" | 2 7/8" | 7" | 4 | 3/4" |
| 3" | 3 1/2" | 7 1/2" | 4 | 3/4" |
| 3 1/2" | 4" | 8 1/2" | 8 | 3/4" |
| 4" | 4 1/2" | 9" | 8 | 3/4" |
| 5" | 5 9/16" | 10" | 8 | 7/8" |
| 6" | 6 5/8" | 11" | 8 | 7/8" |
| 8" | 8 5/8" | 13 1/2" | 8 | 7/8" |
| 10" | 10 3/4" | 16" | 12 | 1" |
| 12" | 12 3/4" | 19" | 12 | 1" |
| 14" | 14" | 21" | 12 | 1 1/8" |
| 16" | 16" | 23 1/2" | 16 | 1 1/8" |
| 18" | 18" | 25" | 16 | 1 1/4" |
| 20" | 20" | 27 1/2" | 20 | 1 1/4" |
| 24" | 24" | 32" | 20 | 1 3/8" |
| 30" | 30" | 38 3/4" | 28 | 1 3/8" |
| 36" | 36" | 46" | 32 | 1 5/8" |
Sizing for Standard 300# Ring Gaskets is as follows:
| Gasket (Pipe) Size | Inside Diameter (ID) | Outside Diameter (OD) |
| 1/2" | 27/32" | 2 1/8" |
| 3/4" | 1 1/16" | 2 5/8" |
| 1" | 1 5/16" | 2 7/8" |
| 1 1/4" | 1 21/32" | 3 1/4" |
| 1 1/2" | 1 29/32" | 3 3/4" |
| 2" | 2 3/8" | 4 3/8" |
| 2 1/2" | 2 7/8" | 5 1/8" |
| 3" | 3 1/2" | 5 7/8" |
| 3 1/2" | 4" | 6 1/2" |
| 4" | 4 1/2" | 7 1/8" |
| 5" | 5 9/16" | 8 1/2" |
| 6" | 6 5/8" | 8 3/4" |
| 8" | 8 5/8" | 12 1/8" |
| 10" | 10 3/4" | 14 1/4" |
| 12" | 12 3/4" | 16 5/8" |
| 14" | 14" | 19 1/8" |
| 16" | 16" | 21 1/4" |
| 18" | 18" | 23 1/2" |
| 20" | 20" | 25 3/4" |
| 24" | 24" | 30 1/2" |
| 30" | 30" | 37 1/2" |
| 36" | 36" | 44" |
Sizing for Standard 300# Full Face Gaskets is as follows:
| Gasket (Pipe) Size | Inside Diameter (ID) | Outside Diameter (OD) | Bolt Hole Qty. | Bolt Hole Diameter |
| 1" | 1 5/16" | 4 7/8" | 4 | 3/4" |
| 1 1/4" | 1 21/32" | 5 1/4" | 4 | 3/4" |
| 1 1/2" | 1 29/32" | 6 1/8" | 4 | 7/8" |
| 2" | 2 3/8" | 6 1/2" | 8 | 7/8" |
| 2 1/2" | 2 7/8" | 7 1/2" | 8 | 7/8" |
| 3" | 3 1/2" | 8 1/4" | 8 | 7/8" |
| 3 1/2" | 4" | 9" | 8 | 7/8" |
| 4" | 4 1/2" | 10" | 8 | 7/8" |
| 5" | 5 9/16" | 11" | 8 | 7/8" |
| 6" | 6 5/8" | 12 1/2" | 12 | 7/8" |
| 8" | 8 5/8" | 15" | 12 | 1" |
| 10" | 10 3/4" | 17 1/2" | 16 | 1 1/8" |
| 12" | 12 3/4" | 20 1/2" | 16 | 1 1/4" |
| 14" | 14" | 23" | 20 | 1 1/4" |
| 16" | 16" | 25 1/2" | 20 | 1 3/8" |
| 18" | 18" | 28" | 24 | 1 3/8" |
| 20" | 20" | 30 1/2" | 24 | 1 3/8" |
| 24" | 24" | 36" | 24 | 1 5/8" |
| 30" | 30" | 43" | 28 | 1 7/8" |
| 36" | 36" | 50" | 32 | 2 1/8" |