Identifying 3/4 x 4 CS-N-LW bolt properties

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Anyone determine what the definition/properties of this bolt is?
3/4 x 4 CS-N-LW
 

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a 3/4-4? That's one coarse thread. It's definitely not a UN series thread. Can you tell us what context you are seeing this callout? What is it used in, etc...
 
FredGarvin said:
a 3/4-4? That's one coarse thread.
Thats what I thought, is there an alternate way of specifying threads in the US? Does 4 on it's own imply MIL?

Or it could be rebar,thats about 3/4-4!
 


Could it be an ACME thread? Lead or ball screws with 4 turns per inch are pretty common. The CS-N-LW could just be the manufacturer's material & finish specifications.
 


Do you actually have one of these or just the description? If just the description, is there any possibility that this refers to a vacuum fitting?
 


jasc15 said:
Could it be an ACME thread? Lead or ball screws with 4 turns per inch are pretty common. The CS-N-LW could just be the manufacturer's material & finish specifications.
I too thought about that, but, from what I saw, 3/4" starts at 5 TPI.
 

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