popular thread sizes..

[Retro-gone.]

on my 73 fqcelift capri, im good with all the metric stuff but its the imperial thread sizes ive never really grasped , im gonna buy an assorted lot of imperial bolts/nuts but what exactly do i need?

mainly for engine bay and suspension ,,

[60ftman]

Engine bolts are usually UNC, and I suspect body bolts & suspension will be UNF.

Rocker covers are probably 1/4 UNC, inlet & exhaust manifolds 5/16 UNC, Bell-housing either 3/8 or 7/16 UNC.

 

It's always handy to have a selection of 1/4, 5/16 and 3/8 UNF nuts, bolts & washers.

(Washers are more-or-less the same as 6mm, 8mm & 10mm)

[Retro-gone.]

thanks for that

 

although all threads directly associated with the engine ie manifolds, rocker cover etc are metric.

[60ftman]

thanks for that

 

although all threads directly associated with the engine ie manifolds, rocker cover etc are metric.

 

Pinto then?

 

In which case just go for the UNF selection.

[Retro-gone.]

yeah its a pinto (sorry i just assume everyone knows my car )

so i just need unf selection not unc?

[danny69]

I have found the smaller sizes ie. 5/16 are usually UNC and the larger ones such as 3/8 and 7/16 are usually UNF. That is on my mk 2 Capri anyway, but there is plenty of metric stuff too.

Personally I would just buy what you need rather than a huge range that you may never use.