Where can I find a 10-28 screw?
Carl Hayes
Posts: 841
I have a spare spindle for the engraving machine I use for making front panels.· It is missing the mounting screw, which is a 10-28 screw one inch long.
10-24 UNC screws (Unified National Coarse) are easy to find.
10-32 UNF screws (Unified Naional Fine) are easy to find.
10-28 UNS screws (Unified National Something-or-other) are exceedingly difficult to find.· I need only one.· Can anyone suggest a source?· I don't particularly need any particular material (steel, brass, titanium, whatever, though brass would be nice), and I don't especially care about the head shape (Fillister head, binding head, etc.), although a socket head would be nice.
I've spent days Googling for 10-28 screws.· Some guns use them, but only too-short ones.· A friend says that early Cessna control-panel screws were 10-28, but that's unverified.
Any ideas?
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· -- Carl, nn5i@arrl.net
10-24 UNC screws (Unified National Coarse) are easy to find.
10-32 UNF screws (Unified Naional Fine) are easy to find.
10-28 UNS screws (Unified National Something-or-other) are exceedingly difficult to find.· I need only one.· Can anyone suggest a source?· I don't particularly need any particular material (steel, brass, titanium, whatever, though brass would be nice), and I don't especially care about the head shape (Fillister head, binding head, etc.), although a socket head would be nice.
I've spent days Googling for 10-28 screws.· Some guns use them, but only too-short ones.· A friend says that early Cessna control-panel screws were 10-28, but that's unverified.
Any ideas?
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· -- Carl, nn5i@arrl.net
Comments
'Any chance you could drill out the mating hole and install a Heli-Coil insert for a more conventional size?
-Phil
Here's an image of an original.
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· -- Carl, nn5i@arrl.net
Meanwhile, my engraver has two sets of pantograph arms (most don't).· The second set is a duplicating arm and·is fixed at 1:1, and the (identical) spindle mounts in a fixed location.· I intend to keep the second spindle mounted·on the 1:1 arm, so don't need the handle for frequent loosening and tightening.
The second spindle actually came from a whole second engraving machine that I bought in derelict condition and am refurbishing for sale on eBay.· Eventually that second spindle will go back to that second machine (I've already rebuilt it with new bearings) when that engraver is ready to sell (but I may give away instead, to a friend who runs a Judo school in North Carolina and would like to engrave trophies).· There are some missing items (including that screw) that need to be replaced before I can sell it in good conscience.· I'll get them on eBay, and by the time I'm ready to sell it, I'll have a couple hundred bucks in it.· It should sell at about six hundred or more, so I hope for a nice profit.· Thus I don't want to drill and Helicoil the spindle assembly even though I have all that Helicoil stuff on hand.
Maybe I'll buy another spindle on eBay, with screw, rebuild it, and sell it without screw (but with full disclosure).· Seems a drag, and might be a money-loser.
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· -- Carl, nn5i@arrl.net
· A quick Google for 10-28 turned up WB Parts which list a number of 10-28 parts including many for aircraft, so the Cessna connection is probably good. Is there a flying club or maintenace airport in your area?
· Alternatively, get a 10-28 die and some rod and make up a few bolts for yourself.
·Cheers,
·
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Tom Sisk
http://www.siskconsult.com
·
You might just run a local yellow pages query for nuts and bolts. I would think most major cities would have a similar supplier of specialty machine items.
There is also a magazine called Home Shop Machinist ( http://www.homeshopmachinist.net/ ) that is typically packed with sources for weird parts for stuff like guns, machine tools and steam engines - go figure.
Whose the manufacturer?
Jim-
PS: Small parts would have been my knee jerk reaction too but they do not carry it. That surprised me, I thought they had everything.
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When your problem seems insurmountable, read the forum for a while.
Solve someone else's problems and yours won't seem so bad.
"Get a 10-28 die" -- more or less like saying "find the holy grail" or perhaps "flap your arms and fly to the moon".· I've looked for taps & dies too.· But thanks anyway.
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· -- Carl, nn5i@arrl.net
I think I've discovered the problem. Your screw isn't really a #10 but, rather, 3/16" (a distinction without a difference, perhaps). Retry your search for 3/16-28. It's still not a very common size, but I got a lot more hits than with a #10. 3/16 and #10 may be a "crossover" size between inch and numbered bolt series (although 3/16" stovebolts are customarily 24tpi).
-Phil
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Tom Sisk
http://www.siskconsult.com
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When your problem seems insurmountable, read the forum for a while.
Solve someone else's problems and yours won't seem so bad.
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· -- Carl, nn5i@arrl.net
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· -- Carl, nn5i@arrl.net
· -- Carl
First e-mail bounced.· Evidently they've changed from sales@tapco.com to sales@tapcousa.com.· Just sent one to that.
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· -- Carl, nn5i@arrl.net
Post Edited (Carl Hayes) : 3/13/2009 8:22:29 PM GMT
Have you tried this guy for a replacement screw?
-Phil
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· -- Carl, nn5i@arrl.net
Just stumbled upon this 4 yr old post - but I was wondering if you had any luck finding your #10-28 set screw? I have been trying to replace a set screw for a bracket for holding up a curtain rod and I am pretty sure at this point that I need a #10-28 screw. If not, you might try finding this type of bracket... or I could send you a couple set screws and just buy new brackets... ~Jonathan
Anyway, since this is a five-year-old discussion, it's probably moot.
3/16 = 3/16 = 0.1875 dia
-Phil