Best (Formerly Stanley) BB855F-5 x 6-USP Half Mortised Heavy Weigh Concealed Bearing Prison Hinge, Not Offset, 5" x 6" Furnished With Fasteners, Door Weighing Up To 800 Lbs, Based On a 36" x 84" Door, Using [3] Hinges, See Manuf Cut Sheet, USP Prime Coat Gray

The Best BB855F-USP 5" x 6" Concealed Ball Bearing Detention Prison Hinge is designed for use with doors weighing up to 800 lbs and measuring 36" x 84", using [3] hinges. This half mortised, heavy weight hinge is furnished with holes and comes in a prime coat gray finish. Refer to the manufacturer's cut sheet for more details.

• 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 ensuring 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) applications. All other configurations are made to order