BlueTR3A-5EKT Posted April 13, 2021 Report Share Posted April 13, 2021 Can anyone answer a couple of questions about the original hexagon headed acme screws used to hold the wings on TR4-6. I have no sample at all now as I sold all my bulk stocks in the last year and have just been quizzed by someone. 1. Was the head spanner size always 7/16" af? - I think it was. (I know AH 100-4/6/3000 used BSF spanner size and the moderns use 10 mm) 2. Is it better to have them 3/4" long ( as supplied by Moss etc today) instead of the mix of 5/8" long and 3/4" long the parts books refer to? (Alan Wadley always said - you do only ever see the head and the extra 1/8" of thread eases engagement when fitting panels on your own) ...and the most important as it is very visible on a TR6 front wing. 3. What shape was the end of the hexagon head? Was it flat as supplied today or was it with a pressed in depression, and were there any markings? - see photo for examples of both type. Thanks Peter W Quote Link to post Share on other sites
stuart Posted April 13, 2021 Report Share Posted April 13, 2021 (edited) Yes yes and yes depressed with markings, these recovered from a low mileage TR5 Stuart Edited April 13, 2021 by stuart Quote Link to post Share on other sites
ed_h Posted April 13, 2021 Report Share Posted April 13, 2021 Yes, mine (74) were recessed, too. The washers were also distinctive. Some modern reproductions are not the same. Ed Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 13, 2021 Author Report Share Posted April 13, 2021 Thank you Stuart. Has anyone else found any screws with a different head? Peter W Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 13, 2021 Author Report Share Posted April 13, 2021 1 minute ago, ed_h said: Yes, mine (74) were recessed, too. The washers were also distinctive. Some modern reproductions are not the same. Ed Can you post a photo of the screw head please. Yes that washer with the offset centred hole is correct, as against a penny washer with one edge clipped off. Peter W Quote Link to post Share on other sites
ed_h Posted April 13, 2021 Report Share Posted April 13, 2021 Peter-- Looks like mine were identical to Stuart's Ed Quote Link to post Share on other sites
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