cquisuila Posted January 17 Share Posted January 17 I would like to know the reference of my exhaust nuts (exhaust flange stud) ? Thank you ! Link to comment Share on other sites More sharing options...
telriv Posted January 17 Share Posted January 17 What about your nuts??? Tom T. Link to comment Share on other sites More sharing options...
EmTee Posted January 17 Share Posted January 17 I'm 98% certain they are 3/8" -16 threads per inch. https://www.amazon.com/APDTY-14223-Exhaust-Stud-Kit/dp/B0788CQD8L 1 Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 I changed the hose and the nuts are tired 1 Link to comment Share on other sites More sharing options...
telriv Posted January 17 Share Posted January 17 The studs are a course thread screwing into the manifolds & a fine nut on the other end. I have the correct parts in stock. Tom T. Link to comment Share on other sites More sharing options...
EmTee Posted January 17 Share Posted January 17 If you only need the nuts, brass ones like those pictured above are nice because they won't rust themselves to the studs and are therefore easier to remove. The downside is they probably can only be used once (maybe twice). Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 10 minutes ago, telriv said: The studs are a course thread screwing into the manifolds & a fine nut on the other end. I have the correct parts in stock. Tom T. But i live in France !😁 Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 (edited) i just order this : https://www.rockauto.com/en/moreinfo.php?pk=616909&cc=1319172&pt=13936&jsn=521 Thanks all !!! Edited January 17 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 strange i have 4 on my car Link to comment Share on other sites More sharing options...
EmTee Posted January 17 Share Posted January 17 The Dorman stud is 3/8-16 on both ends. It looks like the manifold side needs to be fine thread. Order these: https://www.amazon.com/Dorman-675-031-Double-Ended-Stud/dp/B0037ZD8B8 https://www.amazon.com.au/Dorman-675-109-Double-Ended-Stud/dp/B0037ZDAYS 1 Link to comment Share on other sites More sharing options...
gungeey Posted January 17 Share Posted January 17 Two short and two long (for the exhaust valve) 1 Link to comment Share on other sites More sharing options...
60FlatTop Posted January 17 Share Posted January 17 (edited) Here is a French vendor for Never Seez. I use it on all my exhaust system parts. It will keep the studs and nuts from rusting, also help lubricate the brass/steel stud. The old Navy saying was "Bad deal, brass and steel" but sometimes you have to do it. I put the Never Seez on all the joints- flange faces, slip joints, anywhere the pipes and parts are joined. It helps if you want to disassemble the system later. https://www.ubuy.fr/en/product/UV8VNK-never-seez-nsbt-8-silver-gray-regular-grade-anti-seize-compound-8-fl-oz-brush-top-can Edited January 17 by 60FlatTop (see edit history) 1 Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 (edited) so diameter 1/2 and not 3/8 ?? dorman 675-031 Double Ended Stud - 1/2-13 x 3/4 In. and 1/2-20 x 1-1/16 In., 10 Pack Universal Fit Edited January 17 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
BrianM Posted January 17 Share Posted January 17 my 70 used 7/16 exhaust studs the 3/8 studs I got at parts store didn't work Link to comment Share on other sites More sharing options...
gungeey Posted January 17 Share Posted January 17 24 minutes ago, cquisuila said: hello can you send me 2 in an enveloppe ? please i bought them *Tom T says he sells them. He just said so. Try dealing with that guy *I'm a guy like you. I have my own crap to fix. *It's too hard today to replace Made in USA stuff with more Made in USA Stuff. *Amazon sells them. You just ordered some. *No good deed goes unpunished. Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 (edited) 23 minutes ago, gungeey said: *Tom T says he sells them. He just said so. Try dealing with that guy *I'm a guy like you. I have my own crap to fix. *It's too hard today to replace Made in USA stuff with more Made in USA Stuff. *Amazon sells them. You just ordered some. *No good deed goes unpunished. i have canceled the order because it is not good and for sold, sorry, i had the wrong person 😋 Edited January 17 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 1 hour ago, telriv said: The studs are a course thread screwing into the manifolds & a fine nut on the other end. I have the correct parts in stock. Tom T. if you want i can buy this you can put in an enveloppe otherwise this is the right model as DORMAN 675-031 ? diameter 1/2 and not 3/8 ? i have a riviera 1966 with an original engine 425 Link to comment Share on other sites More sharing options...
RivNut Posted January 17 Share Posted January 17 3 hours ago, cquisuila said: so diameter 1/2 and not 3/8 ?? dorman 675-031 Double Ended Stud - 1/2-13 x 3/4 In. and 1/2-20 x 1-1/16 In., 10 Pack Universal Fit The threads might be the same diameter but each end has a different TPI - threads per inch. One end is coarse threads, the other end is fine threads. Look closely at the picture that EmTee posted to see the difference. Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 1 hour ago, RivNut said: The threads might be the same diameter but each end has a different TPI - threads per inch. One end is coarse threads, the other end is fine threads. Look closely at the picture that EmTee posted to see the difference. yes i know the different threads on nuts UNC or UFC🙂 Link to comment Share on other sites More sharing options...
RivNut Posted January 17 Share Posted January 17 (edited) 21 minutes ago, cquisuila said: yes i know the different threads on nuts UNC or UFC🙂 For US nuts and bolts you’ll need to know the diameter expressed as a fraction, and the TPI which is expressed as a number. For example, your lug nuts are 1/2 - 20. Head bolts on a nailhead are 7/16 - 13. Many different thread pitches, most are unique to the industry and not readily available at your local hardware store. And none are that crazy British Whitworth sizing. Edited January 17 by RivNut (see edit history) Link to comment Share on other sites More sharing options...
EmTee Posted January 17 Share Posted January 17 6 hours ago, EmTee said: The Dorman stud is 1/2". It looks like the manifold side needs to be fine thread. Order these: https://www.amazon.com/Dorman-675-031-Double-Ended-Stud/dp/B0037ZD8B8 https://www.amazon.com.au/Dorman-675-109-Double-Ended-Stud/dp/B0037ZDAYS I'm sorry - I corrected the size stated in my earlier text. They are all apparently 1/2" studs. I posted the links based on the Dorman part numbers in @gungeey's picture. Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 2 minutes ago, RivNut said: For US nuts and bolts you’ll need to know the diameter expressed as a fraction, and the TPI which is expressed as a number. For example, your lug nuts are 1/2 - 20. Head bolts on a nailhead are 7/16 - 13. Many different thread pitches, most are unique to the industry and not readily available at your local hardware store. YES IT finds in France the us bolts, nuts but not us double end stud.... Link to comment Share on other sites More sharing options...
cquisuila Posted January 17 Author Share Posted January 17 4 minutes ago, EmTee said: I'm sorry - I corrected the size stated in my earlier text. They are all apparently 1/2" studs. I posted the links based on the Dorman part numbers in @gungeey's picture. I HAVE corrected with 1/2 and not 3/8 1 Link to comment Share on other sites More sharing options...
RivNut Posted January 17 Share Posted January 17 For the nailheads, the coarse thread goes into the manifold, the nut goes on the fine thread side. 2 Link to comment Share on other sites More sharing options...
OldGerman Posted January 26 Share Posted January 26 Any source for the brass 1/2“ UNF nuts? Not easy to find in metric Europe. Link to comment Share on other sites More sharing options...
XframeFX Posted January 27 Share Posted January 27 4 hours ago, OldGerman said: Any source for the brass 1/2“ UNF nuts? There are many here. But, sources narrow-down when requesting specialty items such as Brass. The big distributor in NA is: https://www.fastenal.com/fast/international-requests Or, try Lithuania! https://www.westbolt.eu/en/ Link to comment Share on other sites More sharing options...
gungeey Posted January 27 Share Posted January 27 Come on Frank, You're German.. Make your own 😆 In all seriousness, take a brass 11mm nut, drill it and tap it. 1 Link to comment Share on other sites More sharing options...
RivNut Posted January 27 Share Posted January 27 Really no need for brass, the factory didn’t use brass. The nut size you need is the same size as your lug nuts. 1/2 - 20. Link to comment Share on other sites More sharing options...
cquisuila Posted January 27 Author Share Posted January 27 In France we found bolts and nuts type inch🙂 Link to comment Share on other sites More sharing options...
60FlatTop Posted January 27 Share Posted January 27 5 hours ago, cquisuila said: In France we found bolts and nuts type inch🙂 French bolts can get a real conversation going at a friend's shop. He innocently "stepped into" an MG TD project that had been shabbily rebuilt. Here is a quote from an MG guide: Engine This list compiled with the help of Dave DuBois. Note: The engine and transmission are French Standard Metric (NOT ISO Metric), with Whitworth heads:5 x 0.75 mm, 6 x 1.0 mm, 8 x 1.0 mm, 10 x 1.5 mm and 12 x 1.5 mm. reflecting their being built in the Hotchkiss Machine Gun Factory. Back in the 1960s I started learning about cars and never forgot one famous quote "The French copy no one.... and no one copies the French". 1 Link to comment Share on other sites More sharing options...
Barney Eaton Posted January 27 Share Posted January 27 Poor guy, trying to repair an American vehicle with inch threads. Today in the US we have access to lots of metric fasteners, but trying to find something special in metric would be a similar issue for us. 1 Link to comment Share on other sites More sharing options...
cquisuila Posted January 27 Author Share Posted January 27 3 hours ago, Barney Eaton said: Poor guy, trying to repair an American vehicle with inch threads. I don,t understand... Trying to repair a riviera 1966 without inch is very difficult.... 1 Link to comment Share on other sites More sharing options...
XframeFX Posted January 28 Share Posted January 28 7 hours ago, cquisuila said: 11 hours ago, Barney Eaton said: Poor guy, trying to repair an American vehicle with inch threads. I don,t understand... Trying to repair a riviera 1966 without inch is very difficult.... Je ne comprends pas! Link to comment Share on other sites More sharing options...
cquisuila Posted January 28 Author Share Posted January 28 5 hours ago, XframeFX said: Je ne comprends pas! I don't understand Barney who tells "repair with inch threads" while my buick riviera has inch threads😁 Link to comment Share on other sites More sharing options...
XframeFX Posted January 28 Share Posted January 28 8 hours ago, cquisuila said: I don't understand I take it simply as sarcasm. With all the fasteners on the internet, we find it just as difficult sourcing "specialty fasteners" in metric as yourself in SAE. An ongoing struggle to source loacally for all of us. Let's face it, Vendors and Buyers are not interested in small online transactions, a few brass nuts for example. However, courier companies Love it! Link to comment Share on other sites More sharing options...
Barney Eaton Posted January 28 Share Posted January 28 I don't understand the confusion and no sarcasm intended......... something must have been lost in the translation. If i had the studs he needs I would send them to France. 2 Link to comment Share on other sites More sharing options...
cquisuila Posted January 29 Author Share Posted January 29 10 hours ago, Barney Eaton said: I don't understand the confusion and no sarcasm intended......... something must have been lost in the translation. If i had the studs he needs I would send them to France. no problem simply inch nuts are not compatible with metric nuts it is normal 1 Link to comment Share on other sites More sharing options...
Barney Eaton Posted January 29 Share Posted January 29 I worked in manufacturing for 38 years and have a pretty good working knowledge of fasteners. Have seen sizes from 3/8 to 1/2 reported as the correct size. I know it is a Buick but 1/2 seems excessive. cquisuila... what is the outside diameter of the stud you need.... give me metric and I will convert to inch measurement. Link to comment Share on other sites More sharing options...
RivNut Posted January 29 Share Posted January 29 From what I can gather, the manifold studs for a Buick are 1/4-20 on the manifold end and 1/4-28 on the nut side. Link to comment Share on other sites More sharing options...
cquisuila Posted February 1 Author Share Posted February 1 (edited) On 1/29/2024 at 10:33 PM, Barney Eaton said: I worked in manufacturing for 38 years and have a pretty good working knowledge of fasteners. Have seen sizes from 3/8 to 1/2 reported as the correct size. I know it is a Buick but 1/2 seems excessive. cquisuila... what is the outside diameter of the stud you need.... give me metric and I will convert to inch measurement. i VERIFY on my car RIVIERA 1966 and this the reality : nut 1/2 20 out (i have used a 3/4 wrench to unscrew the nut) I asked to telriv to buy the bolts but unfortunatly it is expensive to ship to France for individual person I passed with rockauto Edited February 5 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
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