Needle Systems: 15x1, HAx1, 130/705H, SY2020, SY2031, 206x15, PFx130. These needles have a flat side ground on the shank to assure proper alignment with the point of the hook. (Intended only for machines designed for Flat Shank needles). This is the standard needle with a flat shank and regular sized eye for use with most home sewing machines. Regular Point. For machines by: Bernina, Brother, Elna, Husqvarna, Janome, Juki, Melco, Necchi, Baby Lock, New Home, Pfaff, Poem, Riccar, Simplicity, Singer, Viking, White & more.

Nearly all household sewing machines use the same type of needle identified by what is known as the "Needle System." Over the years different companies have used various designations for the same needle system. Most companies use 15x1, HAx1, and/or 130/705H for Regular Point. Singer uses 2020 for Regular Point also known as "Red Band" (referring to the red band of coloring on the shank or top of the needle).

If your machine calls for any of the Needle Systems listed above, these needles can be used.
Alternatively if you are looking for Singer 2020 needles.
Also available are the German-made Schmetz 15x1.
Specifications
Organ Needles

Organ Needles are Chrome Plated (Finish).
Organ no longer labels “CF” Chrome Finish or “CP” Chrome Plate because that is the “default” finish for Organ Needles.
The same is true for Groz Beckert & Schmetz as they too don’t label all of their needles “CF” either.
Rest assured that if the needles are not “PD”(titanium), “CS”, “LP”, “HP”(non-stick), they are shiney Chrome by default. Organ