Towa Japan Bobbin Case for Singer 457G, 457U Industrial Zig-Zag Sewing Machine

Bobbin Case with NBL Spring for Singer Industrial Zig-Zag Sewing Machines.

Part #: 502530NBL

Alternate part numbers: BC-457-NBL

Towa Brand. Made In Japan.

No-Back-Lash (NBL) bobbin cases are designed with a brake spring which puts constant, light pressure on bobbins to overcome momentum. Bobbins stop spinning faster, preventing unraveling or tangling of bobbin thread when sewing operations stop and start.

Fits Singer models: 457A, 457G, 457GX, 457U