Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines
Builds, Repairs, Show Your Machines! => Technical Tips, Builds, and Help => Topic started by: D E Jones on May 07, 2022, 05:53:21 pm
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The Screw Checker shown in the picture is from PEC tools.
https://pec.tools/product-category/gages/screw-checker-gages/
They make really nice stuff and I also have a few of their square blades and rules.
I seen a few different sets of those "bolts and nuts on a wire" on Ebay.
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Machine shop supply such as MSC Industrial will have thread gauges. Before internet, “Manhattan supply” published a hardcover catalog that probably weighed five pounds. If they didn’t stock it, a machinist didn’t need it.
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Frank....where can I get one of those bolt size/thread plates?
Is there one for nuts? I've seen their type in the big box
hardware store, but not for sale.
Wayne
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Check Ebay, there are both a tap and a die offered very reasonable and probably okay for occasional use on brass.
https://www.ebay.com/itm/175081991776?hash=item28c3b32e60:g:zG4AAOSwnVdfg~b-
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[attachimg=1]
I was down at the shop today and can confirm that the Jensen hollow steam screw is indeed #12-32.
While I would be surprised if the tattooed lady at your local hardware store would be able to provide a tap or die for #12-32, the thread is "on the charts" and it would be easy to acquire the tooling at a good industrial supplier.
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Thanks , I was pretty sure that they were 32 pitch, but unsure of the diameter. That is certainly an unusual size.
D E Jones
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According to a chart I downloaded from one of the forums it is #12-32 TPI.
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What size is the Jensen hollow steam screw ? ( thread pitch and diameter )
D. E. Jones