{"product_id":"x-x-open-back","title":"¾\"x ¼\" open Back Flat Spline Aluminum Extrusion","description":"\u003cp\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe National Screen Supply ¾\" x ¼\" Open Back Flat Spline Aluminum Extrusion is an ultra-low-profile framing solution designed for screen installations where space is limited or a minimal visual footprint is desired. Featuring an integrated flat spline groove on the ¾\" face and an open-back design, this extrusion provides secure screen retention while maintaining a clean, unobtrusive appearance.\u003c\/p\u003e\n\u003cp\u003eIts compact profile makes it an excellent choice for narrow framing applications, small screen sections, and installations along the edge of standard 2x4 lumber where larger extrusions may not be practical. The low-profile design helps create a finished look without sacrificing durability or screen retention performance.\u003c\/p\u003e\n\u003cp\u003eAs part of the \u003cstrong\u003eNational Screen System\u003c\/strong\u003e, this extrusion is engineered to work seamlessly with National Screen Supply flat spline and screen products, ensuring proper fit, compression, and long-term durability in exterior environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eMaterial: Extruded Aluminum\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProfile Size: ¾\" x ¼\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProfile Type: Open Back Flat Spline Groove\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStock Length: 21' sticks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGroove Location: ¾\" face\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGroove Design: Engineered for flat spline compression fit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvailable Colors: Black, Bronze, and White\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatibility: Designed for use with National Screen Supply Flat Spline\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eScreen Compatibility: Polyester and\/or Hybrid screen systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApplication: Small screen sections, narrow framing areas, 2x4 lumber applications, patio enclosures, and screen rooms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCorrosion Resistance: Suitable for exterior use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFabrication: Cut, miter, and fasten using standard aluminum fabrication methods\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOrdering Info\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSold As: Pack of 10 (21 ft. per stick)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvailable Colors: Black, Bronze, and White\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFreight: Ships via LTL due to length\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLead Time: Normally ships within 3 business days\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended System Pairing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor consistent installs and reduced field issues, this extrusion is designed to be used with:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNational Screen Supply Flat Spline\u003c\/strong\u003e\u003cbr\u003eMatched to groove tolerances for proper compression and long-term retention.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNational Screen Supply Polyester Screen\u003c\/strong\u003e\u003cbr\u003eHigh durability, low stretch, and ideal for standard enclosure applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNational Screen Supply Hybrid Screen\u003c\/strong\u003e\u003cbr\u003eEnhanced strength and performance for higher-demand environments.\u003c\/p\u003e\n\u003cp\u003eUsing a matched system helps eliminate:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eImproper spline fit or blowout\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eScreen sagging or uneven tension\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstallation inconsistencies across projects\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e21' lengths require proper handling and transport considerations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for tight spaces and low-profile screen applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCommonly used on the edge of standard 2x4 lumber\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePolyester and Hybrid screens are recommended for best performance with this system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProper spline compression is critical to long-term retention\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnvironmental conditions may affect screen tension over time\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIntended for use within the National Screen System\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBest Practice:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor the best fit, performance, and long-term durability, use National Screen Supply extrusions, flat spline, screen, and accessories together as part of the \u003cstrong\u003eNational Screen System\u003c\/strong\u003e.\u003c\/p\u003e","brand":"National Screen Supply","offers":[{"title":"White","offer_id":43385095782467,"sku":"1WH7525","price":25.0,"currency_code":"USD","in_stock":true},{"title":"Bronze","offer_id":43385095815235,"sku":"1BZ7525","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0685\/5544\/0195\/files\/MagScreens-white_.25x.75.png?v=1781282850","url":"https:\/\/nationalscreensupply.com\/products\/x-x-open-back","provider":"National Screen Supply","version":"1.0","type":"link"}