An appropriate model of pivot would be determined by the weight of the door and where the lead lining is in the door. Because Lead is a soft material, the location of the screws for the door portion of the pivot should avoid going into the lead.
Traditionally, the lead lining was in the middle of the door such that the wider spacing of the screw pattern of the 7230F, 7237F, 7230F/7237F INT allowed the lead lining sit between the rows of screws.
Many modern lead lined doors place the layer of lead closer to one or both faces of the door rather than in the middle eliminating the need for the wider spacing between the screw pattern. This allows many more pivot models that might be used with lead lined doors.
In either case, the door manufacturer should be consulted on the location and thickness of the lead lining and the weight of the door, then the templates for the pivots that can accommodate the weight should be compared to the location and thickness of the lead lining to ensure that the pivot mounting screws are going into substantial door material, not positioned to go into the lead lining.
The fact the door is lead lined does NOT require the pivot to be stainless steel. If the lead lined door is fire rated, it would require a fire rated pivot which would be made of steel or stainless steel per NFPA80. The model selected would be based on number 5 above.
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