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Farmer John
Joined: 18 Feb 2010 Posts: 181 Location: Manawatu NZ
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Posted: Wed May 20, 2020 5:46 am Post subject: Small Exterior Door Handle Screws. |
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Hi everybody. I am wanting to fit the drivers door handle on my 1953 Lanchester but am getting dragged into an area where I know nothing, namely threads on tiny screws. I found two screws in my collection of tiny things and each has the diameter and pitch needed however the screw heads and lengths are wrong. I would have a go at shortening but the heads are no good to me.
If somebody could point me at the right diameter thread name and pitch I would be most grateful.
First screw, I measured the thread diameter at 0.108". Two attempts at counting the threads, 20 threads over the 7/16" screw length, and 11 threads over 1/4 of an inch.
Second screw, I measured the thread diameter at 0.177 or 0.18. Several attempts at counting these threads gave me 31 threads over an inch.
I am hoping someone can take into account the make and age of the vehicle and my fifty year old micrometer and vernier caliper and come up with some likely screw specs.
I do not know where I might buy these things here that is a major challenge to come.
Thanks in anticipation
John |
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V8 Nutter
Joined: 27 Aug 2012 Posts: 588
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Posted: Wed May 20, 2020 8:42 am Post subject: |
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It looks as though the small one could be 6 B.A. and the big one 2 B.A. Search B.A. thread charts, you will find loads of info. B.A. was the common small thread system. |
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ukdave2002
Joined: 23 Nov 2007 Posts: 4109 Location: South Cheshire
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Posted: Wed May 20, 2020 8:52 am Post subject: |
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Hi John
Agree; It looks very much like a 6BA thread; 0.11" diameter 0.0209" pitch (about 48 tpi), and a 2BA 0.1850" 31.4 tpi.
BA threads are common on handles of this era.
Dave |
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Farmer John
Joined: 18 Feb 2010 Posts: 181 Location: Manawatu NZ
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Posted: Wed May 20, 2020 9:03 pm Post subject: BA screws |
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Thankyou gentlemen, that is precisely the information I need. I can now shop with confidence knowing exactly what I want.
John |
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Kenham
Joined: 12 Mar 2012 Posts: 209 Location: Kent
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Posted: Wed May 20, 2020 9:45 pm Post subject: |
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Buy yourself a Zeus book, only a few pounds it will give you all the info you need. |
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Miken
Joined: 24 Dec 2012 Posts: 544
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Posted: Wed May 20, 2020 10:37 pm Post subject: |
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If you can't find what you want, Could you open the threads up with an M3 tap?
Metric screws are cheap and readily available. I won't tell anyone. |
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Penman
Joined: 23 Nov 2007 Posts: 4765 Location: Swindon, Wilts.
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Posted: Wed May 20, 2020 11:08 pm Post subject: |
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Hi
You haven't mentioned the head style. If I remember correctly visible screw heads which I believe these to be, were usually countersunk but with a slightly domed top, and of course they would have slots not any of the other more modern aperture such as Phillips or Star etc. _________________ Bristols should always come in pairs.
Any 2 from:-
Straight 6
V8 V10 |
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Peter_L
Joined: 10 Apr 2008 Posts: 2680 Location: New Brunswick. Canada.
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Posted: Wed May 20, 2020 11:18 pm Post subject: |
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Miken wrote: | If you can't find what you want, Could you open the threads up with an M3 tap?
Metric screws are cheap and readily available. I won't tell anyone. |
I won't tell either... for a price $£… |
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MVPeters
Joined: 28 Aug 2008 Posts: 822 Location: Northern MA, USA
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Posted: Thu May 21, 2020 3:14 am Post subject: |
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John
Try your local model railway shop - they should have plenty. _________________ Mike - MVPeters at comcast.net
2002 MINI Cooper 'S' |
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