Dave S. Posted March 7, 2021 Share Posted March 7, 2021 Does anyone know where I can buy 3.5mm x 25mm socket cap screws for mounting engines? Several of my engines have mounting holes designed for this size, I prefer not to drill them out to 4mm or to use undersize screw to hold them in. Model Fixings lists them but they have been out of stock for some time, some eBay supplier claim to have them but on close examination either don't have any or only have marine grade stainless in odd lengths and eye watering prices. It's not a common size, but people must be mounting their OS & Saito engines somehow! Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted March 7, 2021 Share Posted March 7, 2021 https://www.modelshopleeds.co.uk/catalog/index.php?cPath=105_125_741&osCsid=mduf68rb8tk6ll08ii5qgj8089 Quote Link to comment Share on other sites More sharing options...
Dave S. Posted March 7, 2021 Author Share Posted March 7, 2021 Thank you, John - I must try to remember Leeds - that was the answer to 'who delivers glow fuel' recently as well. I spent a year living there in the late 70s, so you'd think I'd remember! 1 Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted March 7, 2021 Share Posted March 7, 2021 You could try modelfixings.co.uk Quote Link to comment Share on other sites More sharing options...
Geoff S Posted March 7, 2021 Share Posted March 7, 2021 It's a while since I used BA sizes but 4BA bolts are 3.6mm dia (0.1417") and Ian at ModelFixings may have them in stock. I guess they'll probably fit nicely. Geoff Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 7, 2021 Share Posted March 7, 2021 Last week I ordered some bolts etc. from Model fixings at 11 30 am they were delivered next day at 10am. great service. Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted March 7, 2021 Share Posted March 7, 2021 Try Rapic RC Justin keeps a wide selection of nuts bolts screws etc . I have bought 3.5 mm cap screws from him in the past Their number is 01795 870414. Quote Link to comment Share on other sites More sharing options...
Andy48 Posted March 7, 2021 Share Posted March 7, 2021 As a stopgap, the screws that hold electrical faceplates to their back boxes are all 3.5mm. Quote Link to comment Share on other sites More sharing options...
Dave S. Posted March 7, 2021 Author Share Posted March 7, 2021 Thanks, I bought a few packs from Leeds - and the nuts & washers from Model Fixings (who I've been using for years - and always impressed by the speed of their delivery), but they have been out of stock of M3.5 x25mm screws for some time now. Thanks for the pointer to Rapid R/C - another one I had forgotten in my search for screws. One of the models (Wot 4) waiting for M3.5s was bought from them last year. Quote Link to comment Share on other sites More sharing options...
Nigel R Posted March 9, 2021 Share Posted March 9, 2021 just thought, probably a bit late brass tube from K&S comes in 3mm ID 3.5mm OD size - could chop a short length to make a pukka sleeve for the mounting lug. 1 Quote Link to comment Share on other sites More sharing options...
Dave S. Posted March 9, 2021 Author Share Posted March 9, 2021 43 minutes ago, Nigel R said: just thought, probably a bit late brass tube from K&S comes in 3mm ID 3.5mm OD size - could chop a short length to make a pukka sleeve for the mounting lug. That's a good idea - I'll buy some if & when I see it on sale. I have a dozen or so M3.5 screws in the post from Leeds for now, hopefully they'll arrive today. Quote Link to comment Share on other sites More sharing options...
Goose is the real hero Posted March 9, 2021 Share Posted March 9, 2021 Funnily enough I bought some of these yesterday from this place: https://www.accu.co.uk/en/cap-head-screws/2818-SSC-M3-5-25-A2 Not cheap but the going rate after looking around. Quote Link to comment Share on other sites More sharing options...
Martin Dilly 1 Posted March 9, 2021 Share Posted March 9, 2021 www.screw-shop.co.uk Located in Bexley, Kent, they have a vast range of metric and other screws. I've only bought over the counter as they are local to me, but they also do on-line orders. Usual disclaimer, just a satisfied customer. Quote Link to comment Share on other sites More sharing options...
Jonathan W Posted March 9, 2021 Share Posted March 9, 2021 No.6-32 UNC screws are also pretty much bang on 3.5mm diameter and available from Model Fixings. Quote Link to comment Share on other sites More sharing options...
Dave S. Posted March 9, 2021 Author Share Posted March 9, 2021 6 hours ago, Jonathan W said: No.6-32 UNC screws are also pretty much bang on 3.5mm diameter and available from Model Fixings. Most of my other fasteners are metric (legacy of living abroad) and I can just imagine my M3.5 and 6-32s getting mixed up - plus need very similar but different tools. My screws arriving in today's post, and the nuts should be here tomorrow. Thanks for the extra links, I'll save them for the next time I am stuck. Quote Link to comment Share on other sites More sharing options...
Nik Harrison Posted March 9, 2021 Share Posted March 9, 2021 Hi, I know you have solved your problem already but here is a site worth knowing. https://boltbase.com/product/a2-stainless-steel-slotted-cheese-head-machine-screws/ Cheers. 1 Quote Link to comment Share on other sites More sharing options...
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