3M PT4SD Pass-Through Device, Square, 4 in, Red

Pass-Through Device for Walls and Floors

The 3M PT4SD is a square fire barrier pass-through device intended for installation in wall and floor assemblies. Its four-inch profile fits standard openings where a three-hour fire rating is required. The red metal construction identifies the unit clearly for inspection and maintenance personnel.

Sustained Fire Exposure Performance

Under continuous fire conditions the device maintains its integrity for the full three-hour rating without degradation. The metal body resists deformation when subjected to prolonged heat, keeping the penetration sealed throughout the test period. No cable loading data applies to this model, so performance is defined solely by the assembly rating.

Thermal Behaviour and Mounting

In normal ambient conditions the unit adds negligible thermal resistance to the assembly and produces no audible noise. Power draw is zero as the device is entirely passive. Mounting hardware is not included, so installers must supply appropriate fasteners for the specific wall or floor substrate.