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P3 75 floor panel fixing
Posted: Sat Apr 20, 2024 10:34 am
by Hud60
I have taken the floor panels out of my P3 75 to restore. I have removed all the fixing bolts which fix into the captive nuts on the outer frame and chassis. I'd like to replace them. What thread are they? I thought they were 1/4BSF but they seem to be slightly finer thread. Many thanks for any help.
Re: P3 75 floor panel fixing
Posted: Sun Apr 21, 2024 7:45 am
by David2021
Possibly 1/4-28 UNF?
David
Re: P3 75 floor panel fixing
Posted: Sun Apr 21, 2024 4:11 pm
by HAD501
It’s a while since I did this job on my P2, but I’m sure the screws are 1/4BSF. So it would be reasonable to expect the same on P3’s as you suggest. No knowing what previous repairers have done I suppose. Have you tried running a 1/4BSF tap into the captive nuts?
Hope that helps, DaveM
Re: P3 75 floor panel fixing
Posted: Thu May 16, 2024 4:27 pm
by David2021
For what it is worth...My P2 floor screws are all csk1/4 26 BSF x1" or 1.1/4" cone pointed. The many missing dished floor board washers I have made up from " Tile/Roof-nail washers" ! They have a 5mm hole, easily opened up to take the 1/4" screw. Available by weight on e-bay. 225grammes was enough, they are a bit thinner than the originals, but do a good job.
Re: P3 75 floor panel fixing
Posted: Fri May 31, 2024 10:58 am
by Hud60
Thank you all for the responses. I have figured 1/4 BSF in the end. As suggested, running a tap through cleared the threads and then cleaned up bolts ran through nicely. Much appreciated!
Re: P3 75 floor panel fixing
Posted: Fri May 31, 2024 11:00 am
by Hud60
David2021 wrote: ↑Thu May 16, 2024 4:27 pm
For what it is worth...My P2 floor screws are all csk1/4 26 BSF x1" or 1.1/4" cone pointed. The many missing dished floor board washers I have made up from " Tile/Roof-nail washers" ! They have a 5mm hole, easily opened up to take the 1/4" screw. Available by weight on e-bay. 225grammes was enough, they are a bit thinner than the originals, but do a good job.
Hi David - thank you for the tip. In the end, I used regular washers, sandwiched between a ball bearing and a socket in the vice and squashed them into a cone shape! Seems to have done the job!