#12 screws 1

[MintJulep]

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

 

[TheTick]

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

 

[KENAT]

The wood screws yes, machine screws, I dont' think so.

I just checked our internal hole chart and even it jumps fom #10 to .25.

KENAT,

Have you reminded yourself of faq731-376 recently, or taken a look at posting policies:

http://eng-tips.com/market.cfm?

 

[MintJulep]

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.

 

[mcgyvr]

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

 

[Eltron]

I've always made the jump from #10 to 1/4" as well.

Dan

http://www.eltronresearch.com

Dan's Blog

 

[drawoh]

mcgyvr,

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

JHG

 

[dgowans]

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...

 

[unclesyd]

It depends on the type or style of the screw as to whats available from each supplier.

http://www.smithfast.com/pancomb.html#square

 

[rlee629]

The 12-24 is available depending on head and drive design. If not if your volume is big enough and you just can't get away from the screw and need 304 s/s versus the 18-8, find a Cold Header and have them made. Someone mentioned fastenal, here is their link below.

http://www.fastenal.com/web/products.ex?N=999600059+1199945103+1199897483+1199929114&Nty=0

 

[John2004]

http://www.mcmaster.com

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

 

[MotorVib]

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

 

[mcgyvr]

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.

 

[eromlignod]

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

 

[RossABQ]

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.

 

[Sparweb]

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

 

[telecomguy]

Use these self-drillers in outdoor telecom cabinets as well:

http://www.itwbuildex.com/heavy.htm

 

[ctopher]

I have used #12 on tooling and other products, but not very common.
Some are listed here:

http://www.mcmaster.com/#socket-head-cap-screws/=g346r

Chris
SolidWorks/PDMWorks 08 3.1
AutoCAD 08; CATIA V5
ctopher's home (updated Aug 5, 2008)
ctopher's blog
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