You purchase a specific part, you would expect the fitting kit to be right too. Wrong or incorrect thread on the attach bolts is not a small faux pas on Rares behalf and should some goose decide to force the bolts into the threads in the vehicle, and subsequent vehicle has accident resulting in harm or death due failure of the supplied part who is liable - not the fitter of the part if he is not a licenced mechanic or accessory fitter (because s/he wouldn't put their licence/income on the line by fitting a bodgy bolt to a seatbelt) - Rares is liable through current product liability laws.
It is illegal to modify or adapt a seat belt attach point in NSW without a compliance statement/certificate from a consulting engineer (unless the kit has a blanket approval as compliant) - this includes tapping or drilling the threads to accept a differnt bolt. This hasn't changed since I wrote and signed my last pink slip in 1996.
However, should there be a statement or instruction in the box specific to imperial threaded vehicles to either use the original bolt/s or source new items themselves then blame/risk falls back onto the installer.
Regards,
Dave.
Edit: I may not have it quite right about the modify/adapt part... From what I remember the wording of the reg was "modify or adapt away from a standard configuration" which might include tapping out the thread to a larger size. Might be worthwhile anyone needing to that to their seatbelt attach points talking to their local AIS but I can't see any issue with running a tap through a thread to clean it up if it was burred.
Dave.
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