Double and triple weight steel weld-on prison hinges. Made for very heavy doors such as prison doors, lead-lined x-ray room doors, and other exceptionally heavy doors. Also for hinged cell-front doors and grated steel doors of penitentiaries, jails, reformatories, etc. Made from steel with welded pin. Phosphated and prime coated for painting. Hinge pin is on solid piece of steel welded at both ends making pin removable impossible. Features two concealed ball bearings assemblies with hardened raceways. Rolled knuckles are welded and machined. Hinge is not swagged. Made for full surface installation (not for mortise installations) Lubrication port in barrel of hinge. Note: Weight rating is based on a door that is 7' H x 3' W using three hinges. 800 lb Model: Made of double weight steel capable of carrying doors weighing up to 800 lb per three hinges. Each hinge leaf is 5" H x 2-7/16" W. Pin diameter is 1/2". Barrell diameter is 1". Leaf thickness is 9/32" (7.1mm). Each bearing contains sixteen 1/8" (3.2mm) hardened and ground steel balls which are assembled within a jacket. 1200 lb Model: Made of triple weight steel capable of carrying doors weighing up to 1200 lb per three hinges. Each hinge leaf is 5" H x 2-3/16" W. Pin diameter is 3/4". Barrel diameter is 1-7/16" Leaf thickness is 3/8" (9.5mm). Each bearing contains sixteen 3/16" (4.8mm) hardened and ground steel balls assembled within a jacket.
