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Ebay - Buyer beware
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<blockquote data-quote="Albervin" data-source="post: 37038" data-attributes="member: 586"><p>A quick search threw this up (cut and paste follows):</p><p><span style="font-family: 'book antiqua'"><em>BSW and UNC threads are compatible except for 1/2" diameter. BSW, also known as Whitworth, is a British thread standard devised in the 19th century. UNC or unified course thread is an American thread standard and is very widely used. Examples: 1/4BSW and 1/4UNC threaded fasteners are interchangeable, as are 5/16BSW and 5/16UNC threaded fasteners. A 1/4BSW nut fits a 1/4UNC bolt and 1/4UNC nut fits a 1/4BSW bolt. The sizes that we get asked about the most and which cause the most confusion are 3/16BSW and 10-24UNC. The UNC standard uses gauge sizes to denote diameters of less than 1/4" in diameter. 10-24UNC is one of these sizes. A 10-24UNC fastener has a diameter of 10 gauge and has 24 threads per inch. The good news is 3/16BSW and 10-24UNC threads are equivalent and interchangeable. Note a couple of things. [1] 1/2BSW and 1/2UNC are not equivalent and are not interchangeable. You must match 1/2UNC nuts with 1/2UNC bolts and screws. Similarly 1/2BSW nuts must be matched with 1/2BSW ... </em></span></p><p><span style="font-family: 'book antiqua'"><em></em></span></p><p>Why would you consider this alternative when the real deal is available from VOCS or Russell? I don't know if Glyn reads this forum but a reply from him would be enlightening. The arrogance, condescension and petulance of the seller's reply would drive me away in an instant.</p></blockquote><p></p>
[QUOTE="Albervin, post: 37038, member: 586"] A quick search threw this up (cut and paste follows): [FONT=book antiqua][I]BSW and UNC threads are compatible except for 1/2" diameter. BSW, also known as Whitworth, is a British thread standard devised in the 19th century. UNC or unified course thread is an American thread standard and is very widely used. Examples: 1/4BSW and 1/4UNC threaded fasteners are interchangeable, as are 5/16BSW and 5/16UNC threaded fasteners. A 1/4BSW nut fits a 1/4UNC bolt and 1/4UNC nut fits a 1/4BSW bolt. The sizes that we get asked about the most and which cause the most confusion are 3/16BSW and 10-24UNC. The UNC standard uses gauge sizes to denote diameters of less than 1/4" in diameter. 10-24UNC is one of these sizes. A 10-24UNC fastener has a diameter of 10 gauge and has 24 threads per inch. The good news is 3/16BSW and 10-24UNC threads are equivalent and interchangeable. Note a couple of things. [1] 1/2BSW and 1/2UNC are not equivalent and are not interchangeable. You must match 1/2UNC nuts with 1/2UNC bolts and screws. Similarly 1/2BSW nuts must be matched with 1/2BSW ... [/I][/FONT] Why would you consider this alternative when the real deal is available from VOCS or Russell? I don't know if Glyn reads this forum but a reply from him would be enlightening. The arrogance, condescension and petulance of the seller's reply would drive me away in an instant. [/QUOTE]
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