Bsp38 vs Bsp58: specs compared
Updated 05 September 2026.
5
specs differ
Bsp38 and Bsp58 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | Bsp38 | Bsp58 |
|---|---|---|
| Designation | 3/8" BSP (G3/8) | 5/8" BSP (7/8"-14 nut) |
| Size / thread | 3/8" BSP (G3/8) parallel | 5/8" BSP female, carried on a 7/8"-14 coupling nut |
| Fitting form | parallel pipe thread | parallel beer thread |
| Seals on | flat washer on the thread face | flat nylon or fibre washer on the face of the thread |
| Rating / role | the smaller UK dispense thread on some shanks, John Guest stem adapters and inline taps | the US and UK draft shank and Sanke coupler beer thread |
Questions and answers
How do Bsp38 and Bsp58 compare?
Bsp38 and Bsp58 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.