3pt Seatbelt Conversion Mounting Bolts (1 Viewer)

[ff347]

I think this is the explanation and an interesting read, from what's left of Pirate. Maybe all the other markets did get 11mm? Damn close sizing.

11mm and other weird bolts

www.pirate4x4.com

Seatbelts are an NTSA/DOT mandated type of thing and guess what, they use SAE hardware, I think you will find the 7/16NF is what you are looking for.

7/16" = 0.4375"
11mm = 0.4331"

20TPI = 0.050"
1.25mm = 0.0492"

 

[Randy88FJ62]

So everyone is right

 

[2mbb]

It's hard to tell but it doesn't look like Sved's threads are fully seated. 20 TPI = 1.27mm thread pitch. this is very close to 1.25 mm pitch. I drew up the schematic below for comparison. You need more that 10 threads to have a 1.25mm pitch tap "jump" treads on a 20 TPI bolt.