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Seat Belt Bolt Size 9 years 5 months ago #152115

I can only think that the thread has been altered for some reason.:shrug: I double checked the thread on mine with the proper tools and confirmed it by running an M12x1.25 tap into the captive nut.
David
:shrug:
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Seat Belt Bolt Size 9 years 5 months ago #152117

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Thanks David I'm pretty sure that the bolts were original on my mounts, they looked like they have never been off my car,the cardboard washer was still on them.Maybe the bolts from the ebay seller were incorrect,I'll try another pair from elsewhere and report back.

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Seat Belt Bolt Size 9 years 5 months ago #152119

Do you not have a tap and die set, they usually have a thread size tool in them. :shrug:
David
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Seat Belt Bolt Size 9 years 5 months ago #152120

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I do but it's a blackspur cheapie so I suppose it wont have the thread size tool. :(

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Seat Belt Bolt Size 9 years 5 months ago #152121

Looks like a little set of feeler gauges. :yesnod:
David
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Seat Belt Bolt Size 9 years 5 months ago #152134

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Yep got one :broon: The 1.25 gauge fits the original bolt spot on but it also fits the UNF thread bolt too :lol:

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Seat Belt Bolt Size 9 years 5 months ago #152149

That's because 7/16 UNF is 20 TPI (Threads Per Inch) and M12 x 1.25 is 20.32 TPI (25.4/1.25)..It should be a slightly better fit in the M12 x 1.25....
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