Thread Post designed by The Featherweight Shop especially for the Singer Model 221 Featherweight, but compatible with most vintage sewing machines with a vertical spool pin. This innovative accessory converts your vertical spool pin to horizontal thread delivery, ensuring smooth, consistent thread flow and reducing tension issues common with vertical thread placement. Designed For: Singer Model 221 Featherweight by The Featherweight Shop Compatible With: Most vintage sewing machines with a vertical spool pin diameter of 4.5mm to 5mm Compatible Models Include: Singer 15, 66, 99, 185, 201, 221, 222, 27, 127, 28, 128, 306, 401A, 403A, 404, 500A, 503A, and many others Benefits: Converts vertical spool pin to horizontal thread delivery Improves thread flow and reduces tension problems Easy to install - simply slides onto existing spool pin Works with standard thread spools Durable construction for long-lasting use Note: For Slant-O-Matic and Rocketeer models, use the far-right spool pin. Perfect for Featherweight enthusiasts and vintage Singer owners looking to optimize their machine's thread delivery system.
