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Torx head screws?
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dan(at)rvproject.com
Guest

Posted: Fri Mar 03, 2006 10:07 am Post subject: Torx head screws?

McMaster absolutely does carry 100 degree flat head screws.  See p/n 

93085A146 (6-32 x 3/8") or 93085A194 (8-32 x 1/2") for example.  I use both 

of those in numerous locations on my airplane.



When you go to www.mcmaster.com, enter "machine screws" in the Find box, and 

it brings up a wizard to drill down to what you want.



On a slightly related topic, in case anybody's redoing tank inspection 

covers, the screws I used there are also from McMaster: p/n 92949A194 - 18-8 

Stainless Steel Button Head Socket Cap Screw 8-32 Thread, 1/2" Length



)_( Dan

RV-7 N714D

http://www.rvproject.com



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Al.Herron(at)Aerojet.com
Guest

Posted: Fri Mar 03, 2006 2:20 pm Post subject: Torx head screws?

I highly recommend the MicroFasteners site for Torx fasteners - I haven't

checked out McMaster yet, but I will.  One word of caution: it is possible

to strip out a Torx fastener, though it's not as easy as stripping a

Phillips head.  Use caution if you're driving into a friction-lock type of

nutplate, these will sometimes created enough resistance to strip the head.

If the self-locking feature isn't critical for the particular location, try

running a tap though the nutplate first.  



After trying to get old Phillips screws out 40-year old skin panels on my

Cessna, I decided early on to put Torx or Allen head fasteners on my RV

wherever possible.



Al Herron



RV-7A



Dissembling my Torx-fastened instrument panel for the umpteenth time.

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khorton01(at)rogers.com
Guest

Posted: Fri Mar 03, 2006 4:39 pm Post subject: Torx head screws?

On 2 Mar 2006, at 21:00, Richard McBride wrote:



 	  Quote: 	
		   



 I looked at my invoices and the item numbers for the button head  

 hex screws I purchased were SBSxxxx.  The countersunk torx were all  

 FCMXSxxxx item numbers.  It appears from the description that the  

 ones you're looking at (SBXS) are torx.  Please let us know what  

 you find out.  If they are, I'm going to start replacing all my hex  

 screws.


	


MicroFasteners responded that the following button head screws have  

Torx receptacles.



http://www.microfasteners.com/catalog/products/SSCFCMXS.cfm



Kevin Horton

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bicyclop(at)pacbell.net
Guest

Posted: Fri Mar 03, 2006 5:32 pm Post subject: Torx head screws?

I stand corrected. I couldn't find them when I searched on machine

screws.



Ed 



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dfischer(at)iserv.net
Guest

Posted: Sat Mar 04, 2006 8:59 am Post subject: Torx head screws?

The advantages of Torx head screws are two-fold:  They have six positions 

instead of four for indexing the drive bit (better for assembly line 

manufacturing), and the biggest: the Torx head does not require a forward 

pressure on the driver to maintain bit engagement like a Phillips or a 

Pozi-drive.  This helps prevent tearing up the screw head during 

installation / removal (especially screws that have been installed for a 

while).



Doug Fischer

RV-9A Jenison, MI

do not archive



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tedd(at)vansairforce.org
Guest

Posted: Sat Mar 04, 2006 10:39 am Post subject: Torx head screws?

 	  Quote: 	
		   the Torx head does not require a forward pressure on the driver to maintain

 bit engagement like a Phillips or a Pozi-drive.


	


The Pozi drive was specifically designed not to require axial force to maintain

engagement.  That is the principle difference between Pozi and Phillips, and is

reason I recommended Pozi as a good alternative to Torx.



Tedd McHenry

Surrey, BC, Canada

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