Club126UK

Fiat 126 Chat => Fiat 126 Mechanical Problem Solving => Topic started by: Bambino126 on February 21, 2014, 10:24:41 AM

Title: Thread - seat belt bolts.
Post by: Bambino126 on February 21, 2014, 10:24:41 AM

Does anyone know what is the correct thread of the bolts that secure the seat belt mountings in the BIS?
Many thanks.

Title: Re: Thread - seat belt bolts.
Post by: andyzeetec on February 24, 2014, 05:24:42 PM

Bit of an odd one, they measure 11mm O/D and it's a fine thread, so that's telling me it's not metric.

Top of the bolt head sais..

3F
8.8

Maybe someone else can help   :headscratch:

Title: Re: Thread - seat belt bolts.
Post by: jokke on February 24, 2014, 05:40:56 PM

I think it is 7/16" UNF.

Title: Re: Thread - seat belt bolts.
Post by: andyzeetec on February 24, 2014, 06:12:18 PM

Quote from: jokke on February 24, 2014, 05:40:56 PM

I think it is 7/16" UNF.

I reckon your probably right there.

The head stamps are to do with the manufacturer and strength of bolt which makes sense as it's for a seatbelt.

Title: Re: Thread - seat belt bolts.
Post by: Bambino126 on March 01, 2014, 02:09:06 PM

It seems to be M11 x 1.25.

I can't think that an 80's Fiat would be using Imperial bolts?

Title: Re: Thread - seat belt bolts.
Post by: Bambino126 on March 01, 2014, 02:12:26 PM

Bought  a "second tap" to clean up the threaded hole and also a "die nut" to clean up the bolt. Goes in and out smoothly now.
The tool shop man said the thread was M11 and "Metric-Fine". Quite a rare one!