Pipe Thread Identifier

Measure the male thread outside diameter and count threads per inch. Calcori compares the measurement with common BSP and NPT references.

Measured outside diameterThreads per inchUnit

Closest matchNPT 1/2"

OD / TPI21.336 / 14

Match qualityHigh

Reference sizing only. Manufacturer ranges and tolerances vary; verify the product datasheet before ordering.

METHOD

How it works

Closest match = smallest combined difference in outside diameter and threads per inch.

Note

Reference values for sizing. Manufacturer ranges, tolerances and standard variants can differ; verify the product datasheet before ordering.