Screw Size Conversion

[bkozura]

Does anyone know of a place to find “modern” conversions for many of the screws listed in the Cessna parts manual? I’m specifically looking for a PK79XZ-8-8 but somewhere that has all of the conversions can be useful in the future.

Thanks!

[6643]

It has taken me a lifetime to learn all this stuff, and half of what I know is just where to look for the info. And you want one stop shopping?

PK = Parker-Kalon. As far as I know, all PK screws are sheet metal threads and self taping. 8-8 means #8 screw, 8/16" (1/2") long. 79XZ is the style. Unfortunately, I don't know what that means, and there is no readily available data. Where is it used?

[8424]

Did a google search for PK79XZ8-8.

This site has some options.

https://www.controller.com/parts/parts- ... ain-search

Aircraft Spruce has one available, but doesn't say the length.

https://www.aircraftspruce.com/catalog/ ... -01360.php

Here's one more.

https://www.wbparts.com/rfq/5305-00-282-0445.html

Found another one. This one has descriptions of several PK screws... Button head, countersink, lengths.

https://fsg-53-screws-bolts-studs.partt ... XA6-6.html

The only PK79XZ-8-8 I can find in the C140A parts catalog is on page 3, figure 1, reference number 1-18. It attaches the wing to windshield fairing. It's the only PK screw that I could find that doesn't use some sort of Tinnerman nut.

Hope this helps.

[6643]

Aircraft Spruce has one available, but doesn't say the length.

According to the listing, this is a 8-10SS screw (#8 screw, 5.8" long, stainless steel).

https://www.aircraftspruce.com/catalog/ ... -01360.php

Here's one more.

https://www.wbparts.com/rfq/5305-00-282-0445.html

If the equivalent part number they list is correct, it is a 100 degree countersunk Phillips head.