Re: Machine Screws -- Spearfish Lake Tales

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Subject: Re: Machine Screws

Author:
Wes

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Date Posted: 13:44:30 12/14/15 Mon
In reply to: Jon 's message, "Machine Screws" on 19:45:48 12/13/15 Sun

We sure get into strange things around here sometimes.

Just out of curiosity, I called a guy locally who does machine shop work. He says that these could be built by almost anyone who does custom machine work and who knows what he's doing -- not everyone would be up for it, though. (He wouldn't but he's a production shop.) The price might be a little steep, but it might be worth it to you in a restoration deal.

-- Wes

>Looking for 8-24x3/4� machine screws, shouldered if
>possible. Note this is 8-24 or coarse thread, NOT 8-32!
>
>Screws are used for built-in furniture in my house.
>The screws attach from the rear into drawer and door
>pulls. The furniture being a �breakfront� or built-in
>china cabinet in each dining room of my 2 flat
>apartment (Craftsman interior, brick Four Square
>exterior) building built in 1914. Wood species is
>furniture �grade�, fine grained (old growth!) 5/4 red
>oak. Construction/assembly is dovetailed drawers with
>door frames rabbeted & doweled. Glass in doors and
>mirrors are beveled. Interior rear walls is beaded oak
>and shelves red oak planks.
>
>From what info I can dig up this size was
>�discontinued� in the late 1940�s per a description in
>my father�s 14th Edition, 1951 publish date,
>Machinery�s Handbook. MH indicated this size/pitch was
>also used in gunsmithing.
>
>I have verified the thread pitch with a pitch guage
>and shaft diameter with a calipers. My efforts were
>double checked by a local machine shop.
>
>The machine shop offered to re-tap with a 8-32
>bottoming tap so I could substitute a �modern� screw.
>As a bit of a purist, I�d like to stay with the
>current 8-24 screws. There are a total of 35 screws.
>
>What I�m looking for is 50 screws and 10 nuts in 8-24
>pitch. Screws could be longer than 3/4�, using a nut
>on the longer shaft and cutting down to the proper
>length, then �restoring� the threads by unscrewing the
>nut. Extra screws & nuts would be saved for future use.

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[> Subject: Re: Machine Screws

Author:
Mike
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Date Posted: 01:17:25 12/17/15 Thu

Try a source of British Standard Whitworth bolts.

The thread diameter of a #8 is either 0.1600 or
0.1640 (depending on which reference you read).
One of the Whitworth sizes is 0.1608, and is
available in a 24 threads per inch.

As an alternate, Travers Tool lists 8-24
taps and dies in its catalog (under "special
thread" category). MSC has taps, but not dies.

Might try info@boltdepot.com or 866-337-9888

Mike