clutch master and slave cylinder retaining nut thread/pitch

[vipfto]

Anyone know the thread of these nuts? Seeing as my car will be back from pipework either tomorrow or Monday forgot to remove clutch line and relocate it first so they removed it already. thought would get the right thread nuts now and make new braided line ready to connect up , just to save some time during the week without taking old line in somewhere.

Pretty sure actual hard line is 3/16 although will now use -4an line but not sure on thread size (bit that goes into master and slave) anyone know? would guess its a BSP thread? pretty sure same as brake master thread too