"can anyone tell me what "4-40" refers to" (was "[Elecraft] K3 #685 arrived")

[Brian Lloyd]

On Apr 27, 2008, at 11:12 PM, Gary Hvizdak wrote:

> At 01:11:22 EDT on Monday 28 Apr 2008 Chris Meagher (VK2LCD) wrote ...
>
> ... K3/10 #685 basic kit arrived 28 April.  Inventory done, all  
> there but no
> "4-40" nuts.  ... can anyone tell me what "4-40" refers to ...

Size #4 screw (0.112" or 2.85mm diameter), 40 threads-per-inch.

http://en.wikipedia.org/wiki/Unified_Thread_Standard

--

73 de Brian, WB6RQN
Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com