PC-100 simply determines the size of pipes from 1/16″ to 1/2″ NPT.
Made entirely of heavy gauge aluminum, this model is perfect for the office, warehouse, or factory floor.
Just turn the thread into the hole that fits to determine pipe size.
- Finest quality – MADE IN USA
- Anodized aluminum construction
- Each pipe size is clearly marked
Basic NPT Pipe Thread Information
- Most ordering mistakes are caused by measuring the pipe size of the fitting or component incorrectly.
- The nominal size of any pipe does not in fact refer to either the outside diameter (O.D.) or the inside diameter (I.D.) of the pipe.
- The table lists standard pipe sizes along with the actual O.D. and I.D. for each size.
- Keep in mind that manufacturers may slightly modify these dimensions to strengthen or enhance the performance of a product.
| Pipe Size (NPT) | Threads Per Inch | Outside Dia. of Pipe | Inside Dia. of Pipe | Without Ream | E | |
| Without Ream | With Ream | |||||
| 1/16 | 27 | .312 | .209 | 1/4 | 15/64 | .250 |
| 1/8 | .405 | .269 | 11/32 | 21/64 | .250 | |
| 1/4 | 18 | .540 | .364 | 7/16 | 27/64 | .300 |
| 3/8 | .675 | .493 | 9/16 | 9/16 | .300 | |
| 1/2 | 14 | .840 | .622 | 45/64 | 11/16 | .420 |
| 3/4 | 1.050 | .824 | 29/32 | 57/64 | .545 | |
| 1 | 11 1/2 | 1.315 | 1.049 | 1 9/64 | 1 1/8 | .661 |
| 1 1/4 | 1.660 | 1.380 | 1 31/64 | 1 15/32 | .681 | |
| 1 1/2 | 1.900 | 1.610 | 1 23/32 | 1 45/64 | .681 | |
| 2 | 2.375 | 2.067 | 2 3/16 | 2 11/64 | .697 | |
Once the correct pipe size has been determined, the engagement dimension “E” may be used to determine the overall length of the component required to assemble properly when fully tightened.