Coffeyville, Kansas -- Home of the Red Ravens (CC team) Unka George (George McDuffee)
There is something to be said for government by a great aristocracy which has furnished leaders to the nation in peace and war for generations; even a democrat like myself must admit this. But there is absolutely nothing to be said for government by a plutocracy, for government by men very powerful in certain lines and gifted with the "money touch," but with ideals which in their essence are merely those of so many glorified pawnbrokers.
Theodore Roosevelt (1858-1919), U.S. Republican (later Progressive) politician, president. Letter, 15 Nov. 1913.
PEM makes threaded inserts that get swaged into sheetmetal. A pemserter is a press that takes the tooling to do this. I used to use Pems in small quantities in a machine I built. But I made some simple hand tools and pressed them in a hand arbor press.
Rivnuts were the first threaded insert for sheetmetal. They were made by BF Goodridge to install de-icing boots on aircraft wings. They come in all sizes and grip lengths with and without a locking notch, countersunk, flat, and the bottom closed for liquid tight applications. They are expensive so unless you need a special application fastener go with something else.
We use the kind that press into our plastic molded parts to provide a metal threaded hole. I also have made lots of press tooling to press them in our products, but that was back when I was doing the jig/fixture/prototype thing, now I'm a production dude. Still not sure which I like best, but I guess that's a good thing. Variety is nice.
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