Can Anybody out there tell me the thread size and pitch for the three countersunk screws that hold the fan cover in place. Its a 1956 150D.
They look like M4 with a finer thread.
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Model D magneto cowl /fan cover screws
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Model D magneto cowl /fan cover screws
by noel » Wed Jun 26, 2019 5:44 pm
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Re: Model D magneto cowl /fan cover screws
by Rob Miller » Thu Jun 27, 2019 11:44 am
I’ve just tried a standard 4 mm screw into a NOS cowling and it went straight in. I would run a tap through to clean the threads up on yours. Someone has probably forced a BA screw in at some point.
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Re: Model D magneto cowl /fan cover screws
by noel » Fri Jun 28, 2019 9:07 am
Thanks Rob
Thats quite possible. The screw that is in there is a finer thread than M4 and I found BSF bolts holding the number plate on. I thought it was worth checking before trying anything that might ruin it.
Thats quite possible. The screw that is in there is a finer thread than M4 and I found BSF bolts holding the number plate on. I thought it was worth checking before trying anything that might ruin it.
- noel
- Posts: 10
- Joined: Wed Apr 17, 2019 1:32 pm
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