Using a fully-threaded screw in a partially-threaded hole

[27_aiden_kim]

Is it standard practice to use a fully-threaded screw in a partially-threaded hole, like this? 

 

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I have a really long screw hole, but the threads are really only needed on the bottom side. If the hole is fully threaded, it's going to take a long time to screw it all in, especially since there are multiple such holes. 

Online, I could only find examples of using partially-threaded screws for partially-threaded holes, but I was wondering if I could use fully-threaded screws in partially-threaded holes. 

[davebYYPCU]

Technically we would not normally see that set up for a single hole.

Two plates, it’s most common to have a bottom part to hold a top plate in position.

Standards - are designed by doing what’s needed, suits the current use.  Yes you could make that a bottom plate, would not normally have the countersink on it.

Might help….

[programming2C78B · Accepted solution]

I have no clue what Dave said

Yes, of course you use a fully threaded screw. The top clearence dia is larger than your bolt. 

The engineers will call this "thread relief"