{"product_id":"rockwood-557-x-19bfb-lever-extension-flush-bolt-with-bottom-fire-bolt","title":"Rockwood 557 x 19BFB Lever Extension Flush Bolt with Bottom Fire Bolt","description":"\u003cp\u003e\u003cspan\u003eThe 557 x 19BFB Lever Extension Flush Bolt with Bottom Fire Bolt is for use on select fire rated plastic \u0026amp; wood covered fire doors. This product maintains the doors strength and features a bottom fire bolt that eliminates the need for floor prep and an oversized fire bolt strike hole that allows for slight door misalignment. When the door is subjected to 230˚F the plug and black plastic cover will melt allowing the bolt to project, locking the leaves together.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3\/4\" backset\u003c\/li\u003e\n\u003cli\u003eDoor strength maintained by corner reinforcing plate\u003c\/li\u003e\n\u003cli\u003eWhen door is subjected to 230˚F, plug and black plastic cover melt allowing bolt to project, locking leaves together\u003c\/li\u003e\n\u003cli\u003eFlush Bolt Rods cannot be extended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBase Material: Brass, Stainless steel\u003c\/li\u003e\n\u003cli\u003eFastener: 7 ea. #8 x 3\/4\" FH combo screws 4 ea. #8 - 32 x 1\/2\" FH MS 4 ea. #8 counter sunk washer\u003c\/li\u003e\n\u003cli\u003eWeight: 0.9lbs.\u003c\/li\u003e\n\u003cli\u003eBottom Bolt Diameter: 13\/16\"\u003c\/li\u003e\n\u003cli\u003eBolt Throw: 3\/4\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Rockwood","offers":[{"title":"US26D - Satin Chrome Plated","offer_id":41929006317653,"sku":"557 x 19BFB US26D","price":180.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1102\/8096\/files\/AADSS1206524.webp?v=1764696815","url":"https:\/\/uslocksupply.com\/products\/rockwood-557-x-19bfb-lever-extension-flush-bolt-with-bottom-fire-bolt","provider":"US Lock Supply","version":"1.0","type":"link"}