[GreenKeys] Screw Sources

[WA5CAB at cs.com]

No, cap screws start at 1/4"  Machine screws stop at #14.  But #14 is rare 
and #12 uncommon.

There are (or were) 3/16" and 1/8" stove bolts.  I forget exactly what the 
1/8" was but a 3/16" stove bolt is substantially the same thing as a round 
head slotted #10-24 machine screw.

One thing I remember about working on Model 15's is that the majority of of 
#6 and #8 machine screws are #6-40 and #8-36.  You don't often run into 
either of those much of anywhere else.

In a message dated 5/8/2009 10:19:16 PM Central Daylight Time, 
k1lky at earthlink.net writes: 
> On May 8, 2009, at 10:40 PM, WA5CAB at cs.com wrote:
> 
> >Roy,
> >
> >Technically, there is no such thing as a 3/16-32.
> 
> I discovered that.  Machine screws start at 1/4 inch.
> 
> >That would be a stove bolt or a carriage bolt, if either of those  
> >came in that size.
> 
> It appears that stove bolts and carriage bolts are 1/4 inch and  
> larger, also.
> 
> >   What you are looking for is a # 10-32 slotted hex head machine  
> >screw,
> 
> Yup.  I find lots of those.  I will find 10-32 bolts in my hardware  
> drawer, though probably not slotted hex head ones.
> 
> Also, if the whole shank is threaded, it's called a Tap Bolt.
> 
> It seems that the hardware used by Teletype Corp. was very nicely  
> made.  Possibly a better class of thread than is common now.  And  
> likely the hardware was made on a screw machine, and not rolled like  
> most hardware nowadays.
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480