[GreenKeys] Teletype 6-40 screws & nuts

[Robert Downs]

Mcmaster has a pretty good selection of threaded fasteners except I think
they would call those UNF instead of ANF (where "U" = "Unified").  Only
drawback will be that the minimum order will in that size probably be a box
of 100.  If you only need one or two, try Ace Hardware first.  And don't
complain about their unit price if they have it.

Robert Downs


-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of John Nagle
Sent: Thursday, May 26, 2022 18:49
To: greenkeys at mailman.qth.net
Subject: [GreenKeys] Teletype 6-40 screws & nuts

> From: John W9DDD<w9ddd at tapr.org> To:greenkeys at mailman.qth.net 
> Subject: [GreenKeys] Teletype 6-40 screws & nuts 
> Message-ID:<ED3A052D-FD42-4C79-96AF-E3C56C66E39A at tapr.org> 
> Content-Type: text/plain;	charset=us-ascii
> 
> Don't know if any of you have been to your local hardware store to
> get a 6-40 screw to replace that one that fell on the floor and can't
> find.  If you have, you were no doubt disappointed to find there
> weren't any.
> 
> What's the solution, I don't know other than don't throw away any
> that you do have. Supposedly at one time they were used in guns.  I
> got blanks stares from the guys in the gun shop I stopped by.

Teletypes are almost entirely American National Fine Thread.
Here's a table of ANF screws:

https://nvlpubs.nist.gov/nistpubs/Legacy/MP/nbsmiscellaneouspub98.pdf

No problem getting them online. I've used some from Brownells:

https://www.brownells.com/gunsmith-tools-supplies/small-hardware/metal-screw
s/long-6-48-8-40-screws-prod19929.aspx

You can cut them to length, then file the end to clean up after
cutting.

Teletype used a slightly different screw head design - shallower
but wider slot. This is mostly a cosmetic issue.

I've had to thread custom bolts to put a Model 15 base on
shock mounts.

				John Nagle

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