Topbow thumbscrew

Nov. 18, 1941 - MB100001 thru Mar. 6, 1942 - MB125809 NO EBAY or COMMERCIAL SALES.
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ee.nanan
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Topbow thumbscrew

Post by ee.nanan » Wed Dec 13, 2017 7:12 pm

Hi! Can someone help me identify what kind of thumbscrew is the one on the left side? The rusted and smaller one... Thanks in advance..

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DavidA
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Re: Topbow thumbscrew

Post by DavidA » Thu Dec 14, 2017 11:32 am

Can't say for sure in this case but the early thumbscrews I believe were coarse thread (or was it visa versa?) Anyhow either way, they did come in both thread one for early and the other late. Where that change took place I cannot remember but someone will chime in here I am sure.

Now as for the possibility of a smaller thumbscrew altogether, I have come across smaller ones as well and always wondered what they were for. I had originally thought that someone had them re-cast as repro and they shrunk because they didn't allow for the cooling process.

This is a good question. What were the smaller thumb screws created for? :?
David Aro - USN SEABEES '66-'70
1941 Ford GP-9244
1941 WILLYS MB-104354
1942 WILLYS MB-131350
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Chuck Lutz
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Re: Topbow thumbscrew

Post by Chuck Lutz » Thu Dec 14, 2017 1:29 pm

Can't see your pic, but the EARLY ones were 5/16" NF (A-2901) and the LATE ones were 3/8" NF (A-3719).
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Adam
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Re: Topbow thumbscrew

Post by Adam » Fri Dec 15, 2017 6:07 am

Gotta get new glasses so I can read.
Last edited by Adam on Fri Dec 15, 2017 1:08 pm, edited 1 time in total.

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DavidA
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Re: Topbow thumbscrew

Post by DavidA » Fri Dec 15, 2017 12:24 pm

Chuck:
Can't see your pic, but the EARLY ones were 5/16" NF (A-2901) and the LATE ones were 3/8" NF (A-3719).
See...I told ya someone would chime in with the right answer. :P

Donate now to the Dyslexia Foundation. :D
David Aro - USN SEABEES '66-'70
1941 Ford GP-9244
1941 WILLYS MB-104354
1942 WILLYS MB-131350
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Chuck Lutz
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Re: Topbow thumbscrew

Post by Chuck Lutz » Fri Dec 15, 2017 12:57 pm

Hope these help you...
Slat Pivot 5-16 Thumbscrew size.jpg
Slat Pivot 5-16 Thumbscrew size.jpg (94.5 KiB) Viewed 387 times
Top Bow Pivot Screw 5-16s in..jpg
Top Bow Pivot Screw 5-16s in..jpg (29.96 KiB) Viewed 387 times
Top Bow Pivots Willys A3719 LATE.jpg
Top Bow Pivots Willys A3719 LATE.jpg (44.48 KiB) Viewed 387 times
Chuck Lutz

GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
Bantam T3-C 1947

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