557 Lever Extension Flush Bolt by Rockwood Hardware

For Fire Rated Plastic & Wood covered fire doors measuring up to 4' W x 10' H rated up to and including 1-1/2 hours.

Fastener: 7 each #8 x 3/4 FH Combo Screws; 4 each 8-32 x 1/2 FH MS; 4 each #8 Counter Sunk Washer.
Material: Cast Brass.
Features: 3/4" bolt throw, 3/4" backset. Door strength maintained by corner reinforcing plate.
Finish: The Rockwood 557 Flush Bolt comes in Brass (605), Satin Brass (606), Satin Bronze (612), Oil Rubbed Bronze (613), Polished Chrome (625), and Satin Chrome (626) finish.

Faceplate: 1" x 6-3/4".
Strike: 15/16" x 2-1/4".