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Antique Engine Archives All archived posts from 1999 to 2004 when SmokStak was on EnginAds. This is a read-only board.

Antique Engine Archives

How many obsolete thread counts were used?

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Old 09-18-2004, 11:36:35 AM
Brian Decatur co. Ia
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Default Re: Fri. Nite Trivia

I forget what they are right off, but if anybody has worked on a Briggs & Stratton 2 piece Flo-Jet carb and goobered up the threads for the nozzle tube, they have an unusual thread pitch that a good tap & Die set doesn't have. Good thing Briggs sells the taps. Theres 3 different sizes of 2 piec Flo-Jets.
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Old 09-18-2004, 06:27:21 PM
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Default Trivia: buzz coils

If you have ever tried to replace the nuts which hold the points on a model T buzz coil you will quickly find that they are a 12-32 thread. Have also seen some 1/2-12 threads on oilfield stuff.
Old 09-19-2004, 12:52:21 AM
Chuck Rich
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Default Re: Trivia: buzz coils

Size 12-24 & 12-32 are standard for the size 2 machine screw, its the size 12 that is almost never used anymore. At one time they were quite common in electrical items.

Chuck in windy Central Oregon
Old 09-19-2004, 06:50:23 AM
Posts: n/a
Default Re: Fri. Nite Trivia

Simon has got the two main ones, BSF and Whitworth, later to be called BSW.

In addition, we had BA (British Association) Brass Thread 26tpi, Admiralty Thread (for instruments etc) Birmingham Cycle Thread, Acme Thread form, used on the Lister coldstarting changeover valve) Copper Thread and others.

A lot of the Metric injection thread standards came over from Germany with the Bosch designs and are still used today.

Details (tables etc) of some of the more unusual threads are on our website, url should show below.


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Old 12-26-2004, 02:41:28 AM
TerryJay TerryJay is offline
Join Date: Dec 2004
Location: Oklahoma USA
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Default Re: Fri. Nite Trivia

you can also mail order taps and dies from Enco tool,MSC supply,Travers Tool, have a listing for all the oddball threads you have mentioned. Any good Industrial supply can order them in and have them in a couple of days usually cheaper than taking something to a machine shop


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