P3 75 floor panel fixing

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Hud60
Posts: 5
Joined: Sat Apr 23, 2022 8:34 pm

P3 75 floor panel fixing

Post by Hud60 » Sat Apr 20, 2024 10:34 am

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.

David2021
Posts: 249
Joined: Sun Jan 31, 2021 4:29 pm
Location: Stratford upon Avon

Re: P3 75 floor panel fixing

Post by David2021 » Sun Apr 21, 2024 7:45 am

Possibly 1/4-28 UNF?
David

HAD501
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Location: Cheltenham

Re: P3 75 floor panel fixing

Post by HAD501 » Sun Apr 21, 2024 4:11 pm

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

David2021
Posts: 249
Joined: Sun Jan 31, 2021 4:29 pm
Location: Stratford upon Avon

Re: P3 75 floor panel fixing

Post by David2021 » 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.

Hud60
Posts: 5
Joined: Sat Apr 23, 2022 8:34 pm

Re: P3 75 floor panel fixing

Post by Hud60 » Fri May 31, 2024 10:58 am

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!

Hud60
Posts: 5
Joined: Sat Apr 23, 2022 8:34 pm

Re: P3 75 floor panel fixing

Post by Hud60 » Fri May 31, 2024 11:00 am

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!

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