Stanley BB855A 5" x 6" Concealed Ball Bearing Detention Prison Hinge, Application A Double Weight, Up To 800 lbs.

Features For Stanley Hardware BB855A Prison Hinge, Application "A" Double weight Door hinge Up to 800 LBS 

• For lead-lined doors to x-ray rooms and other exceptionally heavy doors
• Made of double weight steel capable of carrying doors weighing up to 800 lbs. (363 Kg) (Based on a 3' x 7' door with 3 hinges)
• Each of the 2 concealed hardened steel races contains sixteen 1/8" (3.2mm) hardened and ground steel balls which are assembled within a jacket
• Concealed bearings are well lubricated insuring smooth, long lasting operation
• Rolled knuckles are welded and machined
• Typically made not swaged, no holes (application A) for full surface applications, or for full mortise (applications C) application. All other configurations are made to order

Certifications Stanley Hardware , BB855A Double Weight Heavy Duty Prison Door Hinge, Triple weight Door Hinge