BigCol Posted May 14, 2017 Share Posted May 14, 2017 What size rivnut (or rubber well nuts) would my <ahem> friend need to effect a repair to the rear panel having lost my, sorry, his rear wing and torn the old ones out? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 14, 2017 Member Share Posted May 14, 2017 The sort of rubber well nuts I used to mount my jack under the bonnet have quite a thick lip. Wouldn't that hold the wing away from the side of the car?Edited: See post #19.Jonathan Link to comment Share on other sites More sharing options...
BigCol Posted May 14, 2017 Author Share Posted May 14, 2017 was looking at some past posts and some suggested that rubber well nuts were better (well, more likely to give and so prevent damage) than rivnuts.. hence the query; but take your point Jonathan, the flange bit does look thicker. Link to comment Share on other sites More sharing options...
Tony Whitley Posted May 14, 2017 Share Posted May 14, 2017 Are you talking about Rawlnuts? They do have a shoulder but it's no deeper than the piping between the wing and the body. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 14, 2017 Member Share Posted May 14, 2017 Those look like the rubber well nuts that I used for the jack....RIVNUT®JonathanPS: I used nylon bolts for the rear wings. Link to comment Share on other sites More sharing options...
BigCol Posted May 15, 2017 Author Share Posted May 15, 2017 Agreed... Rivnut - the metal threaded inserts that are fitted by Caterham. Rawlnut (or more generically rubber well nuts) - a rubber, threaded insert that are "kinder" in the event of damaging the rear wing and don't corrode either. The shoulder on the latter looks to be approx 1mm - similar I suspect to the former.But what size do I need? M5... but which length? ditto re the (nylon) bolts? Link to comment Share on other sites More sharing options...
Keith_T Posted May 15, 2017 Share Posted May 15, 2017 I bought rubber Well Nuts (M5) from Probolt as cheaper than Rawl-? which weren't readily available locally.They worked ok but at least one of the rivnuts pulled out leaving a larger hole so the well nuts fell in. I was going to try bonding the Well Nuts in place but ran out of time. It's likely the car will be re-skinned in near future. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 15, 2017 Member Share Posted May 15, 2017 But what size do I need? M5... but which length? ditto re the (nylon) bolts?I used M5 x 25 nylon bolts* into the original fittings. And there's a lot left: how many would you like?On rereading the archives I see that it's recommended to weaken them and/or not fill all the holes.Jonathan* But where's the Self-Appointed Club Pedant when he's needed? :-) Link to comment Share on other sites More sharing options...
Tony Whitley Posted May 16, 2017 Share Posted May 16, 2017 Where do you see a problem with the phrase "nylon bolts" Jonathan? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 16, 2017 Member Share Posted May 16, 2017 Well, not even I capitalises* "nylon". But are they bolts or set screws or machine screws... the thread on mine runs up to the head! I think that those distinctions were never consistent and are now otiose.Jonathan* But should that be in the singular or plural? :-) Link to comment Share on other sites More sharing options...
BigCol Posted May 16, 2017 Author Share Posted May 16, 2017 I asked for advice as I don't want to risk screwing up with the wrong items... Jonathan, your mailbox is full. Link to comment Share on other sites More sharing options...
Tony Whitley Posted May 16, 2017 Share Posted May 16, 2017 Well I just used one of my Elise Rawlnuts to replace the rivnut that had ripped out of my 7. It was a larger diameter so fitted the torn hole well.I have never seen a definitive bolt/screw definition. I thought screws had a shank (like woodscrews) but read elsewhere that a bolt had a nut whereas a screw screws into, say, a block. The latter seems poor to me, as it depends on how the threaded thing is used. Link to comment Share on other sites More sharing options...
SM25T Posted May 16, 2017 Share Posted May 16, 2017 Bolt normally has a plain shank next to the head. A set screw is threaded all the way. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 16, 2017 Member Share Posted May 16, 2017 Wikipedia explains it pretty well. But the first sentence is by far the most important.The latter seems poor to me, as it depends on how the threaded thing is used.Yes, not much use when you're trying to find and buy the right widget. But quite a good principle in linguistics for parts of speech. At least it is if you're a modern descriptivist. ;-)Jonathan Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 16, 2017 Member Share Posted May 16, 2017 Well I just used one of my Elise Rawlnuts to replace the rivnut that had ripped out of my 7.Did the thickness of the flange cause any problems with snugging up the wing and clamping the piping?Jonathan Link to comment Share on other sites More sharing options...
BigCol Posted May 16, 2017 Author Share Posted May 16, 2017 re bolts and screws... my interpretation is as per the link in Jonathan's post - ie bolts are retained by nuts and screws by what they're screwed into... but James May talked in his rebuilder programme about the difference of description vis-a-vis threads all the way to the head, plain bits of shank etc, so I know I'm probably wrong in my nomenclature but am able t make myself understood when buying them...re nylon / Nylon / NYLon... I thought it was apocryphal that the material got its name from a concatenation/abbreviation of New York and London... Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 16, 2017 Member Share Posted May 16, 2017 James May talked in his rebuilder programme about the difference of description vis-a-vis threads all the way to the head, plain bits of shankYes, but that criterion is insufficient. I thought it was apocryphal that the material got its name from a concatenation/abbreviation of New York and London...I've heard it a few times. But it isn't true... does that help or hinder it being apocryphal? Nystatin on the other hand...Jonathan Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 17, 2017 Member Share Posted May 17, 2017 Did I mention that they had round heads with slots... ?;-)Jonathan Link to comment Share on other sites More sharing options...
Tony Whitley Posted May 17, 2017 Share Posted May 17, 2017 Did the thickness of the flange cause any problems with snugging up the wing and clamping the piping?I'm not sure about the word "snugging" but no, there wasn't a problem. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 17, 2017 Member Share Posted May 17, 2017 ThanksI'll amend my earlier reservation.Jonathan Link to comment Share on other sites More sharing options...
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