{"title":"Tension","description":"\u003cp\u003eReplacement tension assemblies and tension parts for industrial sewing machines. Complete tension units, springs, discs, and check springs for lockstitch, overlock, and coverstitch machines.\u003c\/p\u003e","products":[{"product_id":"jack-thread-tension-a5e-a","title":"JACK 11501300500 Thread Tension","description":"\u003cp\u003eThe Thread Tension (Part #11501300500) is a genuine JACK original replacement part designed for JACK A4, A5, A5e and JK-5550 series lockstitch machines. Manufactured to OEM specifications for precise fit and reliable performance.\u003c\/p\u003e\n\u003ch3\u003eEquivalent Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJACK:\u003c\/strong\u003e 11501300500\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible Machines\u003c\/h3\u003e\n\u003cp style=\"font-size:13px;color:#666;margin-bottom:8px;\"\u003e\n  This part fits the following industrial sewing machine models:\n\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJACK:\u003c\/strong\u003e A4, A5, A5e, JK-5550, A6F – thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:15px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eJACK\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e11501300500\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eTension\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eNew – OEM Original\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:13px;color:#666;margin-top:16px;\"\u003e\n  Looking for a replacement thread tension for your JACK A4 or A5 lockstitch machine? This genuine OEM part ensures reliable performance and precise fit. Shop with confidence — all parts ship from Miami, FL.\n\u003c\/p\u003e\n\u003cdiv style=\"margin-top:20px;padding:12px 16px;border-left:4px solid #e8a020;background:#fffbf2;\"\u003e\n  \u003cp style=\"margin:0;font-size:13px;color:#555;\"\u003e\n    \u003cstrong\u003e⚠️ Compatibility Notice:\u003c\/strong\u003e Always verify your machine model and subclass number before ordering. Part numbers and compatibility are provided as a reference only. Supra Sewing is not responsible for purchases made without confirming compatibility with your specific machine. All sales on replacement parts are final.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"JACK","offers":[{"title":"Default Title","offer_id":49453500105006,"sku":"JACK-11501300500","price":20.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/1514\/8334\/files\/Photoroom_019_20241002_191424_c427a0cf-efb9-4696-b02a-d7e94e0587d3.jpg?v=1728049562"},{"product_id":"jack-wire-clamp-assy-cover-stitch","title":"JACK 3101300800 Coverstitch Tension Clamp Assy","description":"\u003cp\u003eThe Coverstitch Tension Clamp Assy (Part #3101300800) is a genuine JACK original replacement part designed for JACK W4D, K5 and JK-K5 coverstitch series coverstitch machines. Manufactured to OEM specifications for precise fit and reliable performance.\u003c\/p\u003e\n\u003ch3\u003eEquivalent Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJACK:\u003c\/strong\u003e 3101300800\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible Machines\u003c\/h3\u003e\n\u003cp style=\"font-size:13px;color:#666;margin-bottom:8px;\"\u003e\n  This part fits the following industrial sewing machine models:\n\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJACK:\u003c\/strong\u003e W4D, K5, JK-K5 coverstitch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:15px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eJACK\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e3101300800\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eTension\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eNew – OEM Original\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:13px;color:#666;margin-top:16px;\"\u003e\n  Looking for a replacement coverstitch tension clamp assy for your JACK W4D or K5 coverstitch machine? This genuine OEM part ensures reliable performance and precise fit. Shop with confidence — all parts ship from Miami, FL.\n\u003c\/p\u003e\n\u003cdiv style=\"margin-top:20px;padding:12px 16px;border-left:4px solid #e8a020;background:#fffbf2;\"\u003e\n  \u003cp style=\"margin:0;font-size:13px;color:#555;\"\u003e\n    \u003cstrong\u003e⚠️ Compatibility Notice:\u003c\/strong\u003e Always verify your machine model and subclass number before ordering. Part numbers and compatibility are provided as a reference only. Supra Sewing is not responsible for purchases made without confirming compatibility with your specific machine. All sales on replacement parts are final.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"JACK","offers":[{"title":"Default Title","offer_id":49453832929582,"sku":"JACK-3101300800","price":125.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/1514\/8334\/files\/Photoroom_010_20241004_140910.jpg?v=1728069165"},{"product_id":"thread-tension-for-sw810","title":"Thread Tension for SW810","description":"\u003cp\u003eReplacement thread tension assembly for the SPEEDWAY® SW810 industrial lockstitch sewing machine. This spare part restores proper upper thread tension, ensuring balanced, consistent stitches on a wide range of fabric weights.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for worn or damaged thread tension unit on the SW810\u003c\/li\u003e\n\u003cli\u003eMaintains consistent upper thread control for clean lockstitch formation\u003c\/li\u003e\n\u003cli\u003eEasy to install without specialized tools\u003c\/li\u003e\n\u003cli\u003eDesigned to OEM fit specifications for the SW810 needle bar configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e SPEEDWAY® SW810 industrial lockstitch sewing machine.\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":51311881945390,"sku":null,"price":19.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/1514\/8334\/files\/Photoroom_003_20251126_110643.jpg?v=1764173720"},{"product_id":"jack-1411300300-tension-asm","title":"Jack 1411300300 TENSION ASM","description":"\u003cp\u003eThe TENSION ASM (Part #1411300300) is a genuine JACK original replacement part designed for JACK F4, F4-7, F4-H and F5. F6 series lockstitch machines. Manufactured to OEM specifications for precise fit and reliable performance.\u003c\/p\u003e\n\u003ch3\u003eEquivalent Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJACK:\u003c\/strong\u003e 1411300300\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJUKI:\u003c\/strong\u003e 229-45356\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible Machines\u003c\/h3\u003e\n\u003cp style=\"font-size:13px;color:#666;margin-bottom:8px;\"\u003e\n  This part fits the following industrial sewing machine models:\n\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJACK:\u003c\/strong\u003e F4, F4-7, F4-H, F5. F6, A2, F3, A2S, 5558G, A3-B\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:15px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eJACK\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e1411300300\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eTension\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eNew – OEM Original\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:13px;color:#666;margin-top:16px;\"\u003e\n  Looking for a replacement tension asm for your JACK F4 or F4-7 lockstitch machine? This genuine OEM part ensures reliable performance and precise fit. Shop with confidence — all parts ship from Miami, FL.\n\u003c\/p\u003e\n\u003cdiv style=\"margin-top:20px;padding:12px 16px;border-left:4px solid #e8a020;background:#fffbf2;\"\u003e\n  \u003cp style=\"margin:0;font-size:13px;color:#555;\"\u003e\n    \u003cstrong\u003e⚠️ Compatibility Notice:\u003c\/strong\u003e Always verify your machine model and subclass number before ordering. Part numbers and compatibility are provided as a reference only. Supra Sewing is not responsible for purchases made without confirming compatibility with your specific machine. All sales on replacement parts are final.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"JACK","offers":[{"title":"Default Title","offer_id":51866832109870,"sku":"JACK-1411300300","price":11.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/1514\/8334\/files\/1411300300.jpg?v=1774363275"},{"product_id":"jack-2111300500-overlock-tension","title":"Jack 2111300500 OVERLOCK TENSION","description":"\u003cp\u003eThe OVERLOCK TENSION (Part #2111300500) is a genuine JACK original replacement part designed for JACK E4S, C5, C6 and C7 series overlock machines. Manufactured to OEM specifications for precise fit and reliable performance.\u003c\/p\u003e\n\u003ch3\u003eEquivalent Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJACK:\u003c\/strong\u003e 2111300500\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible Machines\u003c\/h3\u003e\n\u003cp style=\"font-size:13px;color:#666;margin-bottom:8px;\"\u003e\n  This part fits the following industrial sewing machine models:\n\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJACK:\u003c\/strong\u003e E4S, C5, C6, C7, JK-E4S overlock series, €4, €4S, C3, C4, C5S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:15px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eJACK\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003e2111300500\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eTension\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;width:40%;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px;border:1px solid #ddd;\"\u003eNew – OEM Original\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:13px;color:#666;margin-top:16px;\"\u003e\n  Looking for a replacement overlock tension for your JACK E4S or C5 overlock machine? This genuine OEM part ensures reliable performance and precise fit. Shop with confidence — all parts ship from Miami, FL.\n\u003c\/p\u003e\n\u003cdiv style=\"margin-top:20px;padding:12px 16px;border-left:4px solid #e8a020;background:#fffbf2;\"\u003e\n  \u003cp style=\"margin:0;font-size:13px;color:#555;\"\u003e\n    \u003cstrong\u003e⚠️ Compatibility Notice:\u003c\/strong\u003e Always verify your machine model and subclass number before ordering. Part numbers and compatibility are provided as a reference only. Supra Sewing is not responsible for purchases made without confirming compatibility with your specific machine. All sales on replacement parts are final.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"JACK","offers":[{"title":"Default Title","offer_id":51866833355054,"sku":"JACK-2111300500","price":10.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/1514\/8334\/files\/2111300500.jpg?v=1774363275"}],"url":"https:\/\/suprasewing.com\/collections\/tension.oembed","provider":"Supra Sewing Online, Llc","version":"1.0","type":"link"}