{"product_id":"goodrich-wheel-brake-ptfe-backup-ring-68-1389-oem-replacement","title":"Goodrich Wheel \u0026 Brake PTFE Backup Ring 68-1389 OEM Replacement","description":"\u003cp\u003eThe Goodrich Wheel \u0026amp; Brake 68-1389 is a PTFE backup ring intended for aircraft brake assembly hydraulic sealing applications. Manufactured in the United States under CAGE code 97153, this backup ring is an OEM replacement component that is 8130-3 eligible for use in FAA-regulated maintenance programs. ECCN classification is 9A991.d.\u003c\/p\u003e\u003cp\u003ePTFE backup rings are used in aircraft brake hydraulic systems to support O-ring seals and prevent seal extrusion under the elevated hydraulic pressures developed during brake actuation. Without proper backup ring support, O-rings can extrude into the annular gap between the piston and cylinder bore, causing seal damage, erratic brake response, and potential fluid loss. The PTFE material of the 68-1389 provides low friction against the bore surface, resists the hydraulic fluids used in aircraft brake systems, and maintains dimensional stability across the temperature extremes of aircraft brake service. The 68-1389 measures 7.25 x 5.00 x 0.07 inches and weighs 0.01 lb, indicating a large-diameter flat backup ring. HTS code is 8807200010.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e68-1389\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eGoodrich Wheel \u0026amp; Brake\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Type\u003c\/td\u003e\n\u003ctd\u003ePTFE Backup Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePTFE (Polytetrafluoroethylene)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L x W x H)\u003c\/td\u003e\n\u003ctd\u003e7.25 x 5.00 x 0.07 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.01 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eECCN\u003c\/td\u003e\n\u003ctd\u003e9A991.d\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSchedule B\u003c\/td\u003e\n\u003ctd\u003e8807200010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Goodrich Wheel and Brake","offers":[{"title":"Default Title","offer_id":46095077605512,"sku":"68-1389","price":51.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0331\/9391\/8600\/files\/noimage_2048x2048_f4af5ccb-e21d-42b9-a1c6-8bca51b9ab7a.webp?v=1780934691","url":"https:\/\/www.pilotshq.com\/products\/goodrich-wheel-brake-ptfe-backup-ring-68-1389-oem-replacement","provider":"Pilots HQ LLC.","version":"1.0","type":"link"}