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carlossa52(at)gmail.com
Guest

Posted: Tue Nov 25, 2008 7:10 pm Post subject: machine screws

Hello, all

I am looking for some information: I am using machine screws MS51959 6-32 thread ( http://www.aircraftspruce.com/catalog/hapages/ms51959.php ) to fasten an access panel to its frame.

 The frame has several anchor nuts K-1100-06 ( near the bottom of http://www.aircraftspruce.com/catalog/hapages/anchornuts.php ).



I find that the Phillips head in general doesn't last long - I much prefer the ones with a square (Robertson drive) or hex hole.

 Do such screws exist? (i.e., 82 degrees head, 6-32 thread with a square or hex head)

Thanks in advance



Carlos

CH601-HD, plans

Milestone: found a place for the right wing in the garage and hung it.

 Left wing should join it before the holidays (yeah, right....)

  [quote][b]

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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wjones(at)brazoriainet.co
Guest

Posted: Tue Nov 25, 2008 7:23 pm Post subject: machine screws

Hi Carlos ,I bought some 6-32 square hole for  counter sinking ,I do not know the degree of the head .You can call Brazos  fasteners at 979-265-8631 they have a big stock .

 Wade  Jones  South Texas

601XL Franklin 0-235

 [quote]   ---

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psm(at)att.net
Guest

Posted: Tue Nov 25, 2008 10:34 pm Post subject: machine screws

Hi Carlos,



 I've been using some mil. spec. Phillips head screws for access panels to the forward cabin area.  I have removed them several times and the screw heads don't show any damage at all.  



 Perhaps the steel in those mil. spec. screws are a lot harder than the hardware store ones that seem to get reamed out with just a little use.



 I'm not sure if the screws I'm using are the same ones in your A/S link, but I think they are the same as the ones in the original XL drawings for inspection ports.



 Paul

 XL getting close



 

 At 07:09 PM 11/25/2008, you wrote:



 [quote]I am looking for some information: I am using machine screws MS51959 6-32 thread (  http://www.aircraftspruce.com/catalog/hapages/ms51959.php ) to fasten an access panel to its frame.

 The frame has several anchor nuts K-1100-06 ( near the bottom of  http://www.aircraftspruce.com/catalog/hapages/anchornuts.php ).



 I find that the Phillips head in general doesn't last long - I much prefer the ones with a square (Robertson drive) or hex hole.

 Do such screws exist? (i.e., 82 degrees head, 6-32 thread with a square or hex head)

 [b]

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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Terry Phillips

Joined: 11 Jan 2006
Posts: 346
Location: Corvallis, MT

Posted: Tue Nov 25, 2008 10:40 pm Post subject: machine screws

Carlos



 You might try Torx head screws. McMaster-Carr sells 6-32 pan head (I don't know what an 82° head is) for 7-15 cents, depending on material (SS or Zinc-plated steel). I have found Torx head to be more durable than Phillips head screws.



 See p/n 96710A261



 Terry



 

 At 10:09 PM 11/25/2008 -0500, Carlos wrote:

  	  Quote: 	
		  I am looking for some information: I am using machine screws MS51959 6-32 thread ( http://www.aircraftspruce.com/catalog/hapages/ms51959.php ) to fasten an access panel to its frame.

 The frame has several anchor nuts K-1100-06 ( near the bottom of http://www.aircraftspruce.com/catalog/hapages/anchornuts.php ).



 I find that the Phillips head in general doesn't last long - I much prefer the ones with a square (Robertson drive) or hex hole.

 Do such screws exist? (i.e., 82 degrees head, 6-32 thread with a square or hex head)



 

 Thanks in advance



 Carlos

 CH601-HD, plans 	
 

 

 Terry Phillips  ZBAGer

 ttp44~at~rkymtn.net

 Corvallis MT

 601XL/Jab 3300 s .. l .. o .. o .. w build kit - Tail, flaps, & ailerons are done; working on the wings

 http://www.mykitlog.com/N47TP/     [quote][b]

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_________________
Terry Phillips
Corvallis, MT
ttp44<at>rkymtn.net
Zenith 601XL/Jab 3300 slow build kit - Tail feathers done; working on the wings.

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Wed Nov 26, 2008 7:25 am Post subject: Re: machine screws

McMaster-Carr as Terry mentions has every screw on the planet. If they don't have it you don't need it.



I'm using some Torx head screws in several places because they don't slip as much and they look a lot like an installed rivet.



That said. I picked up a trick when fitting the canopy from, of all places, the Zenith build manual. A dab of valve grinding compound pretty much stops slipping screw drivers of all types.

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_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

carlossa52(at)gmail.com
Guest

Posted: Wed Nov 26, 2008 9:48 am Post subject: machine screws

Thank you all for the tips.

A correction: the head angle is 100 degrees, as can be seen in the anchor plate drawing at http://www.aircraftspruce.com/catalog/graphics/04-01724.gif

  - not 82 degrees as I stated on my first note.

Carlos

CH601-HD, plans

slowly but surely, with emphasis on "slowly".

  [quote][b]

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carlossa52(at)gmail.com
Guest

Posted: Wed Nov 26, 2008 4:11 pm Post subject: machine screws

I did some research and found a couple of sources for flat head, 100 degrees (not 82 as I had incorrectly stated), Torx (or 6-lobed) screws (I couldn't find Robertson drive screws):



http://www.mutualscrew.com/subcategories.php?pid=1124

 They sell in bulk (I think the minimum order is a full 18 wheeler) or packages (of 100). Of course, the 100 degrees is only available in bulk.

If I already had problems storing one wing, imagine a truckload of screws. No deal.

 

  http://www.microfasteners.com/catalog/standard.cfm?Category=SSC&SubCategory=FCMXS

Microfasteners does not have a picture for this particular item, but the description is good enough. At $9.70 for 100 (6-32 x 0.5"), I'll probably give it a shot.

 

I did not try Brazos as their web site is not geared for on-line sales, so I skipped it.



I also found an interesting discussion on Matronics, regarding the strength of these screws. A little long, but educational. If you do a "find in page" on "machine screw" you will be taken to one of the last postings, which sums the whole thing up.

 

[/url][url=http://www.matronics.com/archive/archive-get.cgi?RV-Archive.digest.vol-pg]http://www.matronics.com/archive/archive-get.cgi?RV-Archive.digest.vol-pg

   

Thanks to all that replied, and happy building



Carlos



2008/11/25 Carlos Sa <carlossa52(at)gmail.com (carlossa52(at)gmail.com)>

[quote] Hello, all

I am looking for some information: I am using machine screws MS51959 6-32 thread ( http://www.aircraftspruce.com/catalog/hapages/ms51959.php ) to fasten an access panel to its frame.

  The frame has several anchor nuts K-1100-06 ( near the bottom of http://www.aircraftspruce.com/catalog/hapages/anchornuts.php ).

 

I find that the Phillips head in general doesn't last long - I much prefer the ones with a square (Robertson drive) or hex hole.

 Do such screws exist? (i.e., 82 degrees head, 6-32 thread with a square or hex head)



[b]

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

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