Window Knob Screw

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Flynlow
Posts: 2
Joined: Thu May 09, 2013 3:09 pm

Window Knob Screw

Post by Flynlow »

I do a lot of air-to-air photos from my friend's 1953 170. To do this, I take the screw out of the window knob and remove the knob, the washers and other hardware, allowing me to open the window completely. We were just up flying the other day and I reached over to open the window and the knob was gone. I ordered the knob, but does anyone here know what screw I should buy for it?

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hilltop170
Posts: 3485
Joined: Sat May 06, 2006 6:05 pm

Re: Window Knob Screw

Post by hilltop170 »

Since you R&R that screw regularly, why don’t you heli-coil it and use a #4 or #6 machine screw? A PK type screw will eventually work the threads loose in plastic when R&R’d frequently.
Richard Pulley
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
2023 Best Original 170A at Sault Ste. Marie
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
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pdb
Posts: 471
Joined: Tue Apr 23, 2002 3:39 am

Re: Window Knob Screw

Post by pdb »

Until you do the helicoil, use a ss 4X3/8-TRA
Pete Brown
Anchorage, Alaska
N4563C 1953 170B
http://farm3.staticflickr.com/2366/2527 ... 4e43_b.jpg
Flynlow
Posts: 2
Joined: Thu May 09, 2013 3:09 pm

Re: Window Knob Screw

Post by Flynlow »

Thank you both!
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