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  #1  
Old 01-02-2015, 08:54 AM
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JanRV6UK JanRV6UK is offline
 
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Default Avionics rack mounting question
What size screws are normally used for mounting the racks ? It looks like #8 screws ... but I have a rack for a Bendix King KT74 transponder and the holes in the rack "could" fit a #6 screw unless I drill out the hole with a 19 drill... as I do not yet have the transponder ... or the mounting instructions ... I worry that #8 screw heads may interfere with the transponder when it slides in place ...

The rack I have for the COM unit (Garmin GTR 225) looks to be straight forward countersunk #8 screws ... same for the audio unit as well ... It is just the KT74 units that I am not sure about ...
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Old 01-02-2015, 09:36 AM
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#6 is standard.
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Old 01-02-2015, 11:47 AM
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Thanks Walt ! ... Would that then be with a countersunk head or a round head for the #6 screws ?
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Old 01-02-2015, 12:59 PM
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Quote:
Originally Posted by JanRV6UK View Post
Thanks Walt ! ... Would that then be with a countersunk head or a round head for the #6 screws ?
The King manual I checked (KY-97A) says the tray holes are oversize at 0.187 diam. and to use #6 Flat head Philips screws.

With the dimples stamped in the tray around the hole, the countersunk screws will nicely center in the holes.
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Old 01-02-2015, 01:55 PM
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Thanks Gil & Walt ... :-)
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