Metric aircraft countersunk machine screws

On Wednesday, February 7, 2018 at 10:50:55 AM UTC-5, Soartech wrote:
On Tuesday, February 6, 2018 at 12:49:20 PM UTC-5, Bob Kuykendall wrote:
On Sunday, February 4, 2018 at 4:05:21 AM UTC-8, wrote:

'Aircraft Spruce and Specialty' has metric aircraft hardware

Link?

http://www.aircraftspruce.com/menus/...inescrews.html

See any metric screws there? Looks like AN/MS part numbers to me.
UH

On Wednesday, February 7, 2018 at 8:56:24 AM UTC-8, wrote:
On Wednesday, February 7, 2018 at 10:50:55 AM UTC-5, Soartech wrote:
On Tuesday, February 6, 2018 at 12:49:20 PM UTC-5, Bob Kuykendall wrote:
On Sunday, February 4, 2018 at 4:05:21 AM UTC-8, wrote:

'Aircraft Spruce and Specialty' has metric aircraft hardware

Link?

http://www.aircraftspruce.com/menus/...inescrews.html

See any metric screws there? Looks like AN/MS part numbers to me.
UH

McMaster Carr

https://www.mcmaster.com/#machine-screws/=1bgwklj

Stainless 100 degree countersink

Richard
www.craggyaero.com

On Wednesday, February 7, 2018 at 11:07:45 AM UTC-8, Richard Pfiffner wrote:
On Wednesday, February 7, 2018 at 8:56:24 AM UTC-8, wrote:
On Wednesday, February 7, 2018 at 10:50:55 AM UTC-5, Soartech wrote:
On Tuesday, February 6, 2018 at 12:49:20 PM UTC-5, Bob Kuykendall wrote:
On Sunday, February 4, 2018 at 4:05:21 AM UTC-8, wrote:

'Aircraft Spruce and Specialty' has metric aircraft hardware

Link?

http://www.aircraftspruce.com/menus/...inescrews.html

See any metric screws there? Looks like AN/MS part numbers to me.
UH

McMaster Carr

https://www.mcmaster.com/#machine-screws/=1bgwklj

Stainless 100 degree countersink

Richard
www.craggyaero.com

https://www.mcmaster.com/#machine-screws/=1bgwlmh

Steel 100 deg countersink

Richard
www.craggyaero.com

On Wednesday, February 7, 2018 at 7:50:55 AM UTC-8, Soartech wrote:

http://www.aircraftspruce.com/menus/...inescrews.html

Yup, those are machine screws. Didn't see any metric ones, though I didn't check them all.

--Bob K.

On Wednesday, February 7, 2018 at 11:14:40 AM UTC-8, Bob Kuykendall wrote:
On Wednesday, February 7, 2018 at 7:50:55 AM UTC-8, Soartech wrote:

http://www.aircraftspruce.com/menus/...inescrews.html

Yup, those are machine screws. Didn't see any metric ones, though I didn't check them all.

--Bob K.

Mil Spec screw on McMaster Carr are metric and have the 100 deg countersink.

Richard
www.craggyaero.com

On Saturday, February 3, 2018 at 3:51:27 PM UTC-5, Charles Longley wrote:
Does anyone have a source for metric aircraft countersunk machine screws? Similar to MS24693S28. They need to be aircraft hardware store screws have the wrong taper on them. This is for Blanik L-23 & L-33’s.
-----

I went through this a couple months ago. As noted above, metric countersunk screws have a 90 deg countersink, and of course there are different kinds of heads like flat or oval. I wasn't able to find a single supplier that had everything I needed, so ended up ordering some from Mr Metric (aka Mountz) and others from Bel-Metric. Needless to say I bought a few extra of each size!

Good luck,
Brian

On Wednesday, February 7, 2018 at 5:44:51 PM UTC-8, wrote:
On Saturday, February 3, 2018 at 3:51:27 PM UTC-5, Charles Longley wrote:
Does anyone have a source for metric aircraft countersunk machine screws? Similar to MS24693S28. They need to be aircraft hardware store screws have the wrong taper on them. This is for Blanik L-23 & L-33’s.
-----

I went through this a couple months ago. As noted above, metric countersunk screws have a 90 deg countersink, and of course there are different kinds of heads like flat or oval. I wasn't able to find a single supplier that had everything I needed, so ended up ordering some from Mr Metric (aka Mountz) and others from Bel-Metric. Needless to say I bought a few extra of each size!

Good luck,
Brian


Brian
Mil Spec screw on McMaster Carr are metric and have the 100 deg countersink..

Richard
www.craggyaero.com

I looked at the McMaster screws and they’re the wrong head size for Blanik’s.

On Wednesday, February 7, 2018 at 3:02:41 PM UTC-5, Richard Pfiffner wrote:
On Wednesday, February 7, 2018 at 11:14:40 AM UTC-8, Bob Kuykendall wrote:
On Wednesday, February 7, 2018 at 7:50:55 AM UTC-8, Soartech wrote:

http://www.aircraftspruce.com/menus/...inescrews.html

Yup, those are machine screws. Didn't see any metric ones, though I didn't check them all.

--Bob K.

Mil Spec screw on McMaster Carr are metric and have the 100 deg countersink.

Richard
www.craggyaero.com

Richard - can you post a McMaster Carr p/n for a 'metric MIL-spec' countersunk Philips head screw? I can only find imperial sized ones under MIL-spec. Maybe I am not looking in the right place.
Thanks
Uli
'AS'

On Saturday, February 3, 2018 at 8:21:17 PM UTC-8, Charles Longley wrote:
The head diameter on that screw is too big. I need a 4 mm screw with a head diameter around 6.5 mm. I am not sure what the countersink angle is. Looks closer to 100 though.

That head diameter is totally unrealistic; it should be about twice the shaft diameter. Grind the head down if you want it less, but you will have a very small shoulder as a result.

Tom