4B51 4.5″ x 4.5″ Heavy Weight Ball Bearing Hinge Flush Bolts and Coordinators STC 28 rating

STC 28 rating

The minimum space between the door face and the stop is 3/8"

FireLite® NT fire glass with 3-hour certification in limited sizes available

Schlage L9070P Grade 1 Classroom Mortise Lock

4B51 4.5″ x 4.5″ Heavy Weight Ball Bearing Hinge Flush Bolts and Coordinators STC 28 ratingPBB 4B51 4545 4 1 2 x 4 1 2 4 Ball Bearing Heavy Weight (4B), Five Knuckle, Stainless Steel PBB, Inc. template hinges are manufactured to close tolerances and meet all specifications and requirements set by the American National Standards Institute (ANSI). For use on heavy doors or doors receiving high frequency usage Ball bearing hinges must be used on doors in conjunction with door closers and on all fire rated openings All hinges are ANSI template