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  #1  
Old 13-07-17, 16:10
robhume robhume is offline
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Fixing bolt size for harnesses

I have just received a 6 point harness and when I measured the holes on the mounting plates they are 8mm.
The fitting instruction state use 12.5mm or 7/16" bolts, clearly neither of those sizes will fit an 8mm hole.

My chassis already has 7/16" bushes welded in and having contacted the supplier and manufacturer, I have not received an answer.

Any suggestions please.
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Old 13-07-17, 18:09
Lolat492 Lolat492 is offline
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I can understand you having this size difference, there seems no standard.
I think you will need to return the belts for a fitting that has the bolt hole to suit the chassis.
Mine are 8mm bolts, but so were the eye holes.
Contact the belt supplier imho.
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Old 13-07-17, 18:43
robhume robhume is offline
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Comments appreciated and exactly the route I took but unfortunately I have not had a response.
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Old 13-07-17, 18:47
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redturner37 redturner37 is offline
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Rob and I have discussed this problem in private and it seems absolutely ridiculous that there is no standard fittings. I was lucky as both new sets of Sparco 6 point I have fitted to this car have had 3/8" holes in the belt tags and my chassis has holes to take 3/8" bolts. I have seen reference on UHR about drivers / owners having to drill the belt tags out. This has to be wrong.....
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Old 13-07-17, 22:51
Lolat492 Lolat492 is offline
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Drilling has to be avoided, no supplier response is very poor situation, but this is so important as we all appreciate.
I think road car bolts are standard across the world!
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Old 13-07-17, 23:51
stevieturbo stevieturbo is offline
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7/16" is pretty much standard on every road vehicle I've ever seen for belt anchor points.
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Old 14-07-17, 07:59
robhume robhume is offline
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I've got to the point where I can't waste any more time on this waiting for a response from either the supplier or the manufacturer so will sleeve the mountings down and use 8mm bolts or nearest imperial 5/16". I won't be drilling the holes out or changing the bushes.
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Old 14-07-17, 12:37
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Biggles Biggles is offline
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Quote:
Originally Posted by Lolat492 View Post
no supplier response is very poor situation,
Indeed. Who is it so we can all avoid them ?
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Old 14-07-17, 13:42
robhume robhume is offline
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I got a reply this morning which said unfortunately the fitting instructions are out of date and don't contain instruction for single seater. Attached also was a spec sheet for a bespoke harness.
I'm not really into naming and shaming and by doing so, showing restraint and will certainly not be dealing with them again.
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Old 14-07-17, 16:44
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Fireblade Fireblade is offline
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You might not be into naming and shaming but perhaps people should be made aware so that they don't get dicked around like this.
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