What size is the flange nut that holds the rear fog light on?

  1. My model of MX-5 is: __1997 MK1 NA 1.6 90BHp
  2. I’m based near: __Glasgow
  3. I’m looking for technical help or recommendations on: __ The size of the rear flange nut that holds on the rear fog light

My rear fog light needed to be replaced and whilst removing it I managed to shear off both the nuts that was holding it on. I’ve no idea what size they are, and I’ve ordered the below in the hope they’ll do the job. Does anyone know what size they are?

I’ve removed one of the flange nuts that holds the fuse box in place under the bonnet and it looks like it’s the correct size although I’m not 100% sure it’s right but it’s a snug fit

Flange Nut, Battery Clamp / Bumpers / General, All MX5 Models – MX5 Parts