boggie Posted December 15, 2018 Report Share Posted December 15, 2018 Hi all, Does anyone know the size/type of thread of the large-head screw that mounts the hood frame to the brackets on each side? I am making a slightly modified bracket and will need to thread the mounting post when I am done. Is it 1BA or a UNC (size?) or something else? thanks, Ian Quote Link to post Share on other sites
Dic Doretti Posted December 15, 2018 Report Share Posted December 15, 2018 An educated guess would be 1/4" unf, from memory. That's what it is on a Doretti for certain. Cheers Richard Quote Link to post Share on other sites
boggie Posted December 15, 2018 Author Report Share Posted December 15, 2018 Thanks Richard, I don't think it is on the TR. It is a smaller than 1/4", more like a 1BA I think but not sure... Quote Link to post Share on other sites
foster461 Posted December 18, 2018 Report Share Posted December 18, 2018 Ian, are you talking about the triangular plates one each side ?. These are attached to the B post with the 1/4 fine thread countersunk pointy bolts but I dont know how they are attached to the frame. This is a picture from Revington, which is the bit in question ? Stan Quote Link to post Share on other sites
Lebro Posted December 18, 2018 Report Share Posted December 18, 2018 (edited) Item 5 I imagine on your TR4 diagram, Item 28 on this one .https://rimmerbros.com/Item--i-GRID200892 https://rimmerbros.com/Item--i-602029 MIne came without these screws, so I use M6 & tapped the bracket accordingly Bob. Edited December 18, 2018 by Lebro Quote Link to post Share on other sites
boggie Posted December 18, 2018 Author Report Share Posted December 18, 2018 Thanks Chaps, Yes, no5 in the drawing (although that shows a TR4 and we have a TR3a). It is the single, large head screw that mounts the frame to the triangular (L-shaped on the 3a) brackets each side (not the 2x 1/4"UNF coutersunk bolts). It is smaller diameter than 1/4" (but not by much) so we were wondering if it was 1BA.... Ian Quote Link to post Share on other sites
foster461 Posted December 18, 2018 Report Share Posted December 18, 2018 Apologies for the TR4 diagram but it looks like we have identified the part in question. Curious to know what you are planning Ian. Quote Link to post Share on other sites
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