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#12 screws

#12 screws

#12 screws

(OP)
I know it's an official size, but has anyone ever seen or used a #12 screw?

RE: #12 screws

Home Depot gots 'em.  Use #12 wood screws for holding up modular shelves.

RE: #12 screws

(OP)
How 'bouts a machine screw - in 304 stainless?

Fastenal has 'em in 18-8, but you never really know what you're getting with 18-8.

Just jumped out at me on this drawing that I'm looking at.  I can't recall ever using a #12.  Seems like most folks go for the ubiquitous 1/4-20.

 

RE: #12 screws

telecom industry uses #12-24 screws all the time for securing products to the racks.

RE: #12 screws

mcgyvr,

   Are you sure about racks?  All the 19" racks I have seen use 10-32UNC or M6X1.

               JHG

RE: #12 screws

Mint,

We've got a #12-24 screw in one of our products.  Our product is a bolt-on to existing equipment so we didn't have a choice in the matter.

If you think the #12-24 is weird, the same product uses a #18-18 screw.  Try finding those on the shelf anywhere...

RE: #12 screws

www.mcmaster.com has 12-24 machine screws in 18-8 stainless, and in brass & zinc plates steel.  

RE: #12 screws

I have only used 12-24 once on and generator, but the generator was about 40 year old design.  It is out there but I have no idea why someone would use it.

Chris

"In this house, we obey the laws of thermodynamics." Homer Simpson

RE: #12 screws

drawoh,
The 19" rack you are refering to are probably ETSI type(which uses M6) or WECO type or the cheapo economy versions (which use #10). Typical better quality EIA racks,unequal flange racks, seismic,etc.. (much more popular) all use #12-24. We get them from fastenal.. Ours are #12-24 x 1/2" ph pan hd type 23 zinc plated steel.  

RE: #12 screws

You see them specified from time to time.  I personally always jump from 10-24 to 1/4-20.  I also jump from 3/8 to 1/2, skipping 7/16, but that's just me.

In the old-timey times there used to be a #14 machine screw as well, but I haven't seen one of those for a long time.

Don
Kansas City

RE: #12 screws

Harley-Davidsons use them in several places, I believe the seat hold-down on my Sportster uses a 12-24 stud.  Believe it or not, I've seen a similar posting on maybe 4 or 5 different forums on where to get these!  So they must be "un-common" enough to not be stocked in many stores, but "common enough" that people need them.

RE: #12 screws

MintJulep,
They wouldn't be referring to a M12, by any chance?  As in 12mm... and the scale of the drawing is wrong...?

I once went to the hardware store for a 10-32 tap, came home with a 3/16"-32 tap.  Didn't realize until I took it out of the package to use it.  Measured...  Yup 3/16".  I kept it just as a reminder to read the label on things.

Steven Fahey, CET

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