A nozzle assembly for dispensing viscous material is disclosed. The nozzle assembly is convertible from use with a device for dispensing bulk viscous material to use with a device for dispensing viscous material from a cartridge. Alternatively, the nozzle assembly is convertible from use with a device for dispensing viscous material from a sausage package to use with a device for dispensing from a cartridge. When dispensing viscous material from a cartridge, the base portion is arranged for receiving the cartridge conical tip and the flange is arranged for placement between an end plate of the dispenser and the cartridge to retain said nozzle within said dispenser for dispensing viscous material from the cartridge. When dispensing viscous material in bulk form or from a sausage package, a locking plate is provided for tightly retaining the nozzle to the end cap of the dispensing device.