Best (Formerly Stanley) BB855D-5 x 6-USP Full Mortise Heavy Weight Concealed Bearing Prison Hinge 5" x 6", Swaged, Furnished With Fasteners, Door Weighing Up To 800 Lbs, See Manuf Cut Sheet, USP Prime Coat Gray
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The BB855D-USP is a Full Mortise Heavy Weight Concealed Bearing Prison Hinge, designed specifically for doors weighing up to 800 lbs. This 5" x 6" hinge is furnished with pre-drilled holes and swaged for easy installation. It also comes with a prime coat in gray, as detailed on the manufacturer's cut sheet.
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)
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
