What spanner for bleeding rear brake nipples?

[PainTrain]

7mm was too big so im guessing it is an imperial spanner I need, not used to old school cars

Cheers

[oakdale]

1/4 UNF.

[v46m4n]

oakdale said:

1/4 UNF.

Do you mean 1/4 AF? (across flats) UNF is a thread gauge (unified national fine)

[oakdale]

v46m4n said:

Do you mean 1/4 AF? (across flats) UNF is a thread gauge (unified national fine)

Yes I did, don't know what made me say UNF.

[PainTrain]

oakdale said:

Yes I did, don't know what made me say UNF.

Thanks guys, I managed to find a 1/4 spanner in the garage.

I noticed the nearside rear drum wouldnt bleed with an easy bleed, I am going to try the old way with a mate tomorrow, but any thoughts as to why it might not be bleeding would be appreciated.