<VV> Screws and bolts

[BBRT]

In the 4th Edition of the Machinery Handbook, 1941, they mention the 
standard commission of 1918 etc. and before that, the Intl. Commission of 
1898. The Handbook makes no distinction. The items and tables of bolts are 
included within the screw section. No distinction or explanation is given.

Chuck S
Yes, I bought it used, many, many years later... ;>))


----- Original Message ----- 
From: "Daniel Monasterio" <dmonasterio at hotmail.com>
To: "Harry Yarnell" <hyarnell1 at earthlink.net>; "VirtualVairs" 
<virtualvairs at corvair.org>
Sent: Tuesday, June 26, 2012 7:57 PM
Subject: Re: <VV> Screws and bolts


>
> So what are 1/4"-20... bolts or screws ?I grew up knowing all machine 
> threaded ones (those which accept machined nuts) as bolts and those 
> commonly used on sheet metal (non machined threads or self threading) as 
> screws. Could be wrong but any time and at every place I ask for a bolt 
> (tornillo in my place) they show me what I know as a bolt. Same for screws 
> (pijas in my place).Even the numbered nomenclature is different. 1/4"-20 
> means a bolt and #6-1 1/2" means an screw. They don`t sell screws by a 
> measured diameter.Resuming what The Machinery's Handbook, 23 Revised 
> Edition says near the end of  page 1277 , a bolt can accept a nut, an 
> screw can't but, if that bolt is inserted into a machined hole and 
> tightened by it's head, it is an screw.If I understood well, a 1/4"-20 
> fastener is a bolt if used and tightened with a nut but, an screw if 
> inserted on a threaded hole (technically a nut to me) and tightened by the 
> head.Concluding...... ?????????
> As you say.... just my 2 pennies.
> Daniel Monasterio
>
>> From: hyarnell1 at earthlink.net
>> To: virtualvairs at corvair.org
>> Date: Tue, 26 Jun 2012 19:05:01 -0400
>> Subject: <VV> Screws and bolts
>>
>>
>>
>> If it's over 1/4-20. it's a bolt; under that, they're screws.
>>
>> Assuming machine thread.
>>
>>
>>
>>
>>
>> Harry Yarnell
>>
>> Perryman Garage and Orphanage
>>
>> hyarnell1 at earthlink.net
>>
>>
>>
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