(Formerly Stanley) HTFBB179 – 4.5″ x 4.5″ Ball Bearing Hinge with Hospital Tips Electrified Door Closers/Holders For Fire Doors Tailpiece will not work with

Tailpiece will not work with ALX70/PC70 classroom locks

Required for hinge side mount where top rail is less than 3-7/8" (98 mm)

The DORMA ITS9613 is listed by UL and CUL under their continuing reinspection programs

Also shown in this application is an external horn and door position switch

delaying egress while sounding an alarm

(Formerly Stanley) HTFBB179 – 4.5″ x 4.5″ Ball Bearing Hinge with Hospital Tips Electrified Door Closers/Holders For Fire Doors Tailpiece will not work withBest HTFBB179 Five Knuckle Ball Bearing Architectural Hinge, Hospital Tips, Steel, Full Mortise, Standard Weight, 4 1 2" x 4", Square Corner Stanley Hinges have been re branded as Best Hinges. Packaging may change but its still the same quality hinge you have relied on for decades from Stanley. Depending on stock levels and availability these hinges may be shipped with the Stanley or Best packaging. BEST FBB Series hinges are ball bearing hinges that