Singer Industrial Sewing Machine Screws

[Majorpixel]

On 10/28/2019 at 3:07 PM, Bellflory said:

I dont know if you're interested still, but I have parts list & numbers for this machine. I could send you a copy.

 

You wouldn't happen to still have that documentation would you? I'm currently repairing one of these machines.

[catskin]

On 2/11/2019 at 3:39 PM, dikman said:

Extremely unlikely that they would be metric or SAE (or any other "standard" thread). Singer tended to use their own thread sizes.

I realize this post started a long time ago. BUT, I have worked on 29k and 31k15 machines and much to my surprise, haven't found a screw yet that doesn't match a metric size. Both thickness and thread pitch. Get a metric thread gauge and see if the ones you need match.

[Constabulary]

not sure where how you figured that but I have different experience (I´m living in a metric country). Maybe someone overcut the original threads on your machines.

Nothing really metric I´d say:   https://www.singersewinginfo.co.uk/technical/parts/screw_threads/

[catskin]

6 hours ago, Constabulary said:

not sure where how you figured that but I have different experience (I´m living in a metric country). Maybe someone overcut the original threads on your machines.

Nothing really metric I´d say:   https://www.singersewinginfo.co.uk/technical/parts/screw_threads/

I am only telling you my experiance.  I used a metric thread gauge and it matched exactly.  Then I took one screw that there were 2 alike  and tried a metric nut on and it fit just as good as on the metric screw.  SO, if that worked here it might work for some others on at least some screws. These were from machines that had never been touched. Some were from a machine my mother bought NEW almost a 100 years ago. 

If you look at and read the link you sent me you will see that what I said is true. it SAYS MANY of the singer screws match other systems. SOME do not.

Edited December 22, 2025 by catskin

[Constabulary]

okay, may depend on the machine 😉