Discussion
A rivnut is a threaded insert which is installed in asimilar way to a pop rivit. By using a tool the insert is compressed and holds firm in the hole. They are great for none stressed fixings.
Depending on how may you are installing, the best unit is the Memfast one but carbuilder solutions offer a nice kit which is fine for occasionale use. The rivnuts come in various sizes and in steel alloy and stainless. On the bigger sizes if you use a poprivit type tool you will need arms like garth.
Depending on how many you are inserting, it may or may not be econonical to buy a tool.
Trawling the 'net you can find details of how to make your own simple tool - just a strip of steel with a couple of nuts and a screw can be used to pull a few in place sucessfully. Being poor (tight) I sucessfully fitted 16 rivnuts using a homemade 'tool'
Trawling the 'net you can find details of how to make your own simple tool - just a strip of steel with a couple of nuts and a screw can be used to pull a few in place sucessfully. Being poor (tight) I sucessfully fitted 16 rivnuts using a homemade 'tool'
migwell2 said:
Don't be so tight, buy a tool, always worth adding to the toolbox !
As always it depends on how much use it's likely to get. The proper tool is not particularly cheap so for a one off job installing a few rivnuts it makes sense to simply use a high tensile bolt, nut and some washers with plenty of grease. It's slower than using the proper tool but it works fine.For anyone considering using rivnuts to mount parts to chassis rails on kit cars, check out the size of the hole required even for a little M6 bolt. It's large enough to significantly weaken a bit of 25x25 RHS.
Yeah, as Mike says the holes required can be pretty large. Depending on what you're fitting a rivnut may or may not be the best thing for the job. You might be better drilling & tapping a smaller hole, or bolting right through for lightweight stuff, or welding on a boss or bracket for heavier things.
You can also get steel or ally ones, again depends what sort of duty you need from them.
You can also get steel or ally ones, again depends what sort of duty you need from them.
Mr2Mike said:
For anyone considering using rivnuts to mount parts to chassis rails on kit cars, check out the size of the hole required even for a little M6 bolt. It's large enough to significantly weaken a bit of 25x25 RHS.
Indeed - also I've heard that VOSA will fail a kit car at IVA if rivnuts are used in some circumstances (I guess there's no 'list' but it may just be what the inspector considers may not be sufficient, particularly after a period of time)Fastpedeller said:
Indeed - also I've heard that VOSA will fail a kit car at IVA if rivnuts are used in some circumstances (I guess there's no 'list' but it may just be what the inspector considers may not be sufficient, particularly after a period of time)
I think this is the case with brake pipes. A T for instance needs to be bolted through a plate or chassis member with a nyloc on the back.
rdodger said:
I use a memfast one. It is fantastic, easy to use and gives perfect results. They also do adaptors now to set rivstuds too!
I use aluminium studs in aluminium and steel in steel and get them from memfast too. They are cheap enough to get good quality ones.
Looking at buying this tool. First I've heard of the rivstuds! Don't suppose you know of a supplier for them? My google-foo has turned up nothing!I use aluminium studs in aluminium and steel in steel and get them from memfast too. They are cheap enough to get good quality ones.
Cheers, Craig.
A.T. Ninchcock said:
Looking at buying this tool. First I've heard of the rivstuds! Don't suppose you know of a supplier for them? My google-foo has turned up nothing!
Cheers, Craig.
http://www.ebay.co.uk/sch/i.html?_odkw=riveted&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0&_nkw=riv+stud&_sacat=0Cheers, Craig.
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