Well, they will, but won't fit well. You can see the gap and springbar in the union. Forstner won't serve springbars with only endlinks delivery, and had to search for a 18mm pair, as US are too long for not blended end links:

 

Doesn't look half bad to me.

You're using 19mm Forster end links with 18mm spring bars? What diameter spring bars?

Discussion of the Forstner and Uncle Seiko Flat Link bracelets and interchange of end links is touched on here: https://omegaforums.net/threads/ome...tnerbands-flatlink-a-pictorial-review.120591/

 

I couldn't fit uncle seiko 19mm spring bars (they will fit only if you locate one pin side in its hole first, not possible for me with F. solid end link), and Forstner didn't include a pair with spare end links I bought (they should have).
I tried successfuly with chinese quality 18mm, but I will find a thicker pair for safety.
So in the end, I've ordered a whole new Forstner bracelet, just because I like more the look of the end link (fitting of US is maybe a little better and easier, but looks too straight in its bottom for my taste).

 

Was curious about the diameter of the spring bars you're using, Ofrei sells them in various diameters from 1.0mm through 2.0mm.

 

Apologies - spring bars should have been included with your order of end links. Anyone should feel free to contact our support line if something like this happens. We'd be happy to correct the issue.

 

I would say they fit pretty well. And certainly both endlinks are slightly different in most dimensions, but using decent thickness springbars will most certainly change your gap. Here they are switched (FB on US and vice versa).

 

Thanks. I asked for extra spring bars with my second order, this time from USA, as my last Forstner UK delivery took 45 days to Spain with recent Brexit delays.

 

You are right, thicker spring bars improved it.