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Author Topic: Stumped!!!!!!!  (Read 2029 times)

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Offline lptools

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Stumped!!!!!!!
« on: June 19, 2016, 06:55:12 PM »
Hello, I tried to find info on these, and I give up. There is some remnant of a label on the plastic card, NIELCO  and  _YNDHAM Industries Inc. There are 3 male thread sizes , all coarse, 1/4-20, 5/16-18, and 3/8-16. What I am calling the face of these is a recessed area with a centered pin.The larger one in the 3rd & 4th photo is one that I have had here for a while, the other two I put into threaded rod connectors. There is a partial patent number that starts with what looks like 209. I am guessing plumbing, pneumatic, hydraulic, or refrigeration application.   Thanks, Lou
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Offline bill300d

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Re: Stumped!!!!!!!
« Reply #1 on: June 19, 2016, 07:51:04 PM »
My guess would be drain plug assortment.
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Offline Twilight Fenrir

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Re: Stumped!!!!!!!
« Reply #2 on: June 19, 2016, 08:39:21 PM »
Am I the only person who came in here half expecting to see a cut down tree? XD

Anywho, the point would suggest to me some sort of center marking purpose.... but, why that would be on the back of a threaded end, I have no idea...
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Offline RWalters

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Re: Stumped!!!!!!!
« Reply #3 on: June 19, 2016, 09:50:09 PM »
These are transfer screws, used to mark locations for drilling screw holes in a part to line up with blind holes in a mating surface/part. They thread into the blind hole, the parts are put together and struck with a hammer and the point on the transfer screw (they're case hardened) makes a mark, giving you the center of the new hole. The patent number is 2,092,653. If you look that up, the patent drawings show (probably more clearly than my explanation) how they work. One of those tools you may never need to use, but if you do, nothing else will work.
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Offline mikeswrenches

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Re: Stumped!!!!!!!
« Reply #4 on: June 20, 2016, 05:32:45 AM »
I used mine for the first time in about 40 years when I had to make a new set of vise jaws for a Wilton vise I have. They make a difficult layout job easy.

Mike
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Offline lptools

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Re: Stumped!!!!!!!
« Reply #5 on: June 20, 2016, 05:53:55 AM »
Hello, RWalters. Thanks for the info. What I had thought was Nielco, is Nielsen, as in Harry M. Nielsen, the inventor. The patent info also explains how to use these for multiple hole marking, that explains the 4 of each size. I am still looking for info on the manufacturer that produced these. Now I see why the 2 larger ones were found with a threaded rod connector, just a handy way to keep the punches from getting lost. Thanks again, Lou
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