IPF light thread size

Hey there Scubaroo.
Just measured the length of the thread from the bottom of the swivel hub to the leend of the thread and it appears to be 30mm.
Bit hard to get at as the 80 series is parked in the garage and now I have spider webs all over my shirt...oh well.
Hope this helps
Tim

Thanks, but I meant the thread pitch, e.g M6

Couldn't ARB open another box to see.

If you have large IPF lights eg 800/900 series they use M12x1.75

The smaller IPF lights are M10 x 1.5 (I think the pitch is 1.5)

These are the only two sizes they have

Scubaroo,

Metric threads are categorised not only by bolt diameter but also by thread pitch.

Metric thread pitch is measured from the tip of one thread to the tip of the next thread. There are 3 metric thread pitches. These are 1.0, 1.25 and 1.5, measured in millimetres.

e.g M6 1.25, indicates that the bolt diamter is 10 mm and the thread pitch from thread crest to thread crest is 1.25mm

another e.g – M10 1.5 = a bolt diameter of 10mm and a thead pitch of 1.5 mm

another M16 1.0 = 16 mm diameter by 1.0mm thread pitch.

I would hazard a guess that the bolts on your lights are M12 1.5

But that’s only a “guess unseen”

UNC, UNF, BSW and BSF threads are measured differently in “Thread per Inch” or “TPI”

Your best bet is to remove a light and take the bolt down to an engineering workshop or an engineering supplies shop. They'll have a guage that can measure what thread it is.

Bilbo