John Wagg Posted December 25, 2021 Share Posted December 25, 2021 Does anyone know the make of this wing bolt or the thread. I need some new longer bolts as the ones I have are too short (been cut down on other models.) Done a web search but nothing found. Cheers John Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted December 25, 2021 Share Posted December 25, 2021 I thought Radio-Active, since they do something similar, but they might be Flair products -like these. https://www.ebay.co.uk/itm/273916095057 Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted December 25, 2021 Share Posted December 25, 2021 I got some brown ones from a furniture shop a few years ago. Quote Link to comment Share on other sites More sharing options...
Glenn Philbrick Posted December 25, 2021 Share Posted December 25, 2021 Have you tried model fixings ? Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted December 25, 2021 Share Posted December 25, 2021 Ps, I think you will find that they are metric threads, you should be able to get them from a hardware store. Quote Link to comment Share on other sites More sharing options...
Jonathan M Posted December 25, 2021 Share Posted December 25, 2021 If it is metric (it looks like it may well be) then just lightly try any spare metal ones for an easy natural fit that won't damage the threads in the female part, then order nylon ones in your chosen length from Modelfixings. Quote Link to comment Share on other sites More sharing options...
John Wagg Posted December 25, 2021 Author Share Posted December 25, 2021 7 hours ago, leccyflyer said: I thought Radio-Active, since they do something similar, but they might be Flair products -like these. https://www.ebay.co.uk/itm/273916095057 Thank you very much. Certainly look like the ones. Will check up on them. Cheers John Quote Link to comment Share on other sites More sharing options...
John Wagg Posted December 25, 2021 Author Share Posted December 25, 2021 (edited) Regarding the thread I have checked against M5 and the bolt is too big a diameter. Maybe M6 but I don't have anything to try against. These were bought in 1980 / 90s and I suspect they are Imperial. Measuring as close as I can it looks like 1/4" x 26TPI ? Thank you for all the help. Cheers John P.S. M5 bolt is a loose fit in the angle fitting. PPS My internet is working very slow so only able to reply as and when working. Fault on the landline wiring. Edited December 25, 2021 by John Wagg Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted December 26, 2021 Share Posted December 26, 2021 Can't you tap them out to 6mm ?. Quote Link to comment Share on other sites More sharing options...
Bruce Collinson Posted December 26, 2021 Share Posted December 26, 2021 Send one to Ian Shaw at Modelfixings and he will match it for you. They look slightly familiar to me but can’t currently check mine. Suspect they are N American Imperial. BTC 1 Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted December 26, 2021 Share Posted December 26, 2021 have a look on Slec web site...for what you are after..........................Wing Fixing Bolts (slecuk.com) ken anderson...ne..1..bolt dept. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted December 26, 2021 Share Posted December 26, 2021 (edited) It’s not UNF (USA standard threads) as that is 1/4*20 TPI. BSC (British standard cycle) is 1/4*26 TPI. Old motorbike thread. Old plastic, how strong is it. I would solder a nut to some plate. Edited December 26, 2021 by Don Fry 1 Quote Link to comment Share on other sites More sharing options...
John Wagg Posted December 26, 2021 Author Share Posted December 26, 2021 2 hours ago, Paul De Tourtoulon said: Can't you tap them out to 6mm ?. Maybe but bolts measure 6.3mm dia'. M6 = 5.9 x 1 (25.4 TPI). Quote Link to comment Share on other sites More sharing options...
John Wagg Posted December 26, 2021 Author Share Posted December 26, 2021 Still having problems with internet and Openreach not available until 30th December. So apologies for delayed answers. John Quote Link to comment Share on other sites More sharing options...
John Wagg Posted December 26, 2021 Author Share Posted December 26, 2021 (edited) 1 hour ago, Don Fry said: It’s not UNF (USA standard threads) as that is 1/4*20 TPI. BSC (British standard cycle) is 1/4*26 TPI. Old motorbike thread. Old plastic, how strong is it. I would solder a nut to some plate. Just found an old cycle part that fits and so maybe BSC but seems a bit unusual. Also, according to thread charts, could be 0BA but that is very close to M6. Edited December 26, 2021 by John Wagg Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted December 26, 2021 Share Posted December 26, 2021 You could always take them off and bolt a piece of plastic, or glue a hardwood piece of wood and tap it out, if you don't have a tap a blind nut glued in place. Quote Link to comment Share on other sites More sharing options...
John Wagg Posted December 26, 2021 Author Share Posted December 26, 2021 1 minute ago, Paul De Tourtoulon said: You could always take them off and bolt a piece of plastic, or glue a hardwood piece of wood and tap it out, if you don't have a tap a blind nut glued in place. The brackets are held in with screws which are inaccessible, as behind covering, but could be a last resort. Thanks for the suggestion. John Quote Link to comment Share on other sites More sharing options...
Don Fry Posted December 26, 2021 Share Posted December 26, 2021 BSC dies are still available, but they cost. Given that Model Engineers are a strange as we are, (ie interested in odd but fulfilling things), why not put in a plea onto one of their websites, and arrange a die owner to cut a few for you. Quote Link to comment Share on other sites More sharing options...
kc Posted December 26, 2021 Share Posted December 26, 2021 (edited) 1/4 by 26 is BSF ( British Standard Fine ) used on pre war cars etc and later on British lathes like Myford ( older ones ) The pitch of the thread and diameter can be the same but the actual shape and angle of the thread varies for different threads. That's why they can seem similar but don't quite fit. Some people ( myself for example) use steel bolts instead of nylon etc for wing bolts, which are OK as long as you don't crash much. Should be easy to get 1/4 BSF steel bolts from model engineering suppliers or taps and dies from Tracy Tools. I don't think 1/4 by26 BSC is the same as BSF - Tracy Tools list BSC and BSF taps and dies as quite separate items. Don, BSC dies are a very reasonable £3 at Tracy Tools as are most taps and dies etc. Edited December 26, 2021 by kc Quote Link to comment Share on other sites More sharing options...
John Wagg Posted December 26, 2021 Author Share Posted December 26, 2021 Definitely not M6. Just tried a nylon one I found and too loose to be functional. Cheers John Quote Link to comment Share on other sites More sharing options...
kc Posted December 26, 2021 Share Posted December 26, 2021 (edited) There are 1/4 by 26 in BSF also BSC and BSB. BSF used to be very common but BSC and BSB were rare and probably only used on brass parts also BSC on cycles and maybe motorcycle parts. Much more likely your thread is BSF than BSC (cycle) or BSB ( Brass ) However as BSB is used for brass it might have been used on electrical fittings and therefore your part might have come from some electrical source. But try BSF first as it was extremely common in pre war Britain carried over into postwar pre metric Britain. It is very likely a BSC or BSB thread has quite different thread form to the 1/4 by 26 BSF - different thread form for different metals. Edited December 26, 2021 by kc Quote Link to comment Share on other sites More sharing options...
John Stainforth Posted December 26, 2021 Share Posted December 26, 2021 Are you sure it is not M7? I had one model that had a nylon wing bolt of that size, which was not really satisfactory being on the short side: it only went into the plastic nut a few turns. M7 is a less common size, and I ended up replacing the nylon bolt with a longer M7 bolt made of beautiful titanium. Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted December 26, 2021 Share Posted December 26, 2021 I think that those are what used to be quite common wing bolt fixings, available from at least one of the usual model aeroplane accessory manufacturers. I have them on several models. Quote Link to comment Share on other sites More sharing options...
kc Posted December 26, 2021 Share Posted December 26, 2021 (edited) To get around all the confusion about threads a quick solution could be to fix a ply plate into the nut fitting with whatever bolts you can find. Then drill the ply plate and wing for one central modern wing bolt. Nylon etc wing bolts are no use unless you can carry spares! Edited December 26, 2021 by kc Quote Link to comment Share on other sites More sharing options...
John Wagg Posted December 26, 2021 Author Share Posted December 26, 2021 40 minutes ago, kc said: To get around all the confusion about threads a quick solution could be to fix a ply plate into the nut fitting with whatever bolts you can find. Then drill the ply plate and wing for one central modern wing bolt. Nylon etc wing bolts are no use unless you can carry spares! Thanks but not a practical solution but you never know in the end. I'm OK for brackets. its just bolts I need. I bought these in 80/90s, I don't remember where from, may have been LMS or shows. I still prefer nylon bolts and I think if I crashed a plane with metal bolts there would be too much damage. As it is I'm repairing a plane (Galaxy models Domino) that had these nylon bolts and I just need a few to complete. Cheers John Quote Link to comment Share on other sites More sharing options...
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