12 replies to this topic

[Maccmike8]

Hi, please can you confirm they are 3/8 unf?

 

Car is an 87 998 but Im fitted 7.5" brake disc conversion.

 

Thanks Mike.

[nicklouse]

This could be fun. 
 

what callipers are you fitting?

 

yes the original spec was 3/8 UNF.

[Cooperman]

OE or Mini Spares own type for S 7.5" brakes are 3/8" UNF.
There is a modification where Fiesta callipers can be used, but I have no idea of the thread form or size.

[Maccmike8]

Thanks folk. They are AP 7.5".

[Spider]

The Originals as the other guys have said, were 3/8" UNF, however, some of the new types are M10. I would think those marked AP would be imperial though.

It can be hard to pick the difference between M10 and 3/8" UNF, however, they should never be interchanged as there's around 0.5 mm difference between them. Try a Bleed Nipple in a good wheel nut, if it fits, it's 3/8" UNF, if it doesn't, then M10 x 1.0.

[Maccmike8]

Thank you.

[Maccmike8]

Would the rear wheel cylinders be 3/8 too?

[Spider]

Would the rear wheel cylinders be 3/8 too?

 

The originals were 1/4" UNF, but all the replacements I've had in the last 20 years or more have been either M6 or M7.

[Maccmike8]

Thanks Spider.

[richmondclassicsnorthwales]

Yes as Moke says above. The nipple was 6.2mm (1/4 in) and is now a 7mm head

[Maccmike8]

Youve confused me with the head size. I just want to know the thread and pitch size, is that still 1/4 unf?

 

 

Yes as Moke says above. The nipple was 6.2mm (1/4 in) and is now a 7mm head

[nicklouse]

1/4 UNF

[Ethel]

It it's to replace the nipples the safest bet would be to remove 'em & test in a known thread. Plenty of 1/4 & 3/8 unf nuts on a Mini.