{"product_id":"premium-replacement-check-spring-502668-411153-for-singer-457g-457u-sewing-machine","title":"Check Spring 502668=411153 for Singer 457G, 457U Sewing Machine","description":"\u003cp\u003eTension Check Spring (502668 \/ 411153) for Singer 457G \u0026amp; 457U\u003cbr\u003e\nMaintain perfect loop formation and precise thread control with the Premium Tension Check Spring (Part #502668 \/ 411153). Specifically designed for the Singer 457G and 457U industrial series, this high-response spring is the critical component that manages thread slack during the needle's rapid descent.\u003c\/p\u003e\n\n\u003cp\u003eKey Features \u0026amp; Benefits\u003cbr\u003e\nHigh-Response Elasticity: Engineered to handle the intense speed of the Singer 457 series, ensuring the thread stays taut until the needle point enters the fabric, preventing \"bird-nesting\" and skipped stitches.\u003c\/p\u003e\n\n\u003cp\u003eSpecialized for Zig-Zag Action: Designed to compensate for the varying thread requirements of wide zig-zag and 3-step stitching, providing consistent tension regardless of the needle position.\u003c\/p\u003e\n\n\u003cp\u003ePremium Spring Steel: Manufactured from high-fatigue-resistant steel to ensure the spring retains its \"snap\" and tension settings through millions of cycles in a high-volume production environment.\u003c\/p\u003e\n\n\u003cp\u003ePart Supersession (502668 = 411153): This part replaces the older model number 502668 with the updated 411153 standard, ensuring a perfect fit in the tension assembly of both 457G and 457U machines.\u003c\/p\u003e","brand":"Universal","offers":[{"title":"Default Title","offer_id":48307118145785,"sku":"502668","price":1.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/6733\/3113\/files\/Singer_Premium_Replacement_Parts.jpg?v=1776585850","url":"https:\/\/empenzoamericas.com\/products\/premium-replacement-check-spring-502668-411153-for-singer-457g-457u-sewing-machine","provider":"Empenzo Americas Corp.","version":"1.0","type":"link"}