Various European (BSP) Thread Fittings

<< Back To Browse Common Espresso Machine Parts

Thread size chart - British standard pipe thread
Note: All thread sizes listed on our site are British Standard Pipe Parallel (BSPP) thread size unless mentioned otherwise.
These sizes are not compatible with NPT (National Pipe Thread - the US standard for plumbing pipe) or compression (the US standard for interior home and business hose connections).

Advertised size - Inside diameter	Outside Diameter (inches)	Outside Diameter (mm)	Comments
1/8"	~ 3/8 "	~ 9.5 mm	NOT the same as NPT
1/4"	~ 1/2 "	~ 13 mm	NOT the same as NPT
3/8"	~ 5/8 "	~ 16.5 mm	NOT the same as NPT
1/2"	~ 7/8 "	~ 20.5 mm	NOT the same as NPT
3/4"	~ 1 "	~ 24 mm	NOT the same as NPT
For more information on the British Standard thread sizes click on this link.