Thread: Threading diagram for a 451K31?
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Old 08-09-2017, 06:44 AM
  #3  
Cari-in-Oly
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If you go to this web page - http://parts.singerco.com/
you'll see the link to the manuals for Singer industrial machines. I saw a couple 451 manuals though not one for the K31 specifically.

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