The nozzle body has a 1/4" Bsp Female Threaded x M 18 Male threaded end that will accept the Cooper Pegler 18mm plastic nozzle cap and nozzle.
Original Cooper Pegler spare part number 322267.
Plastic adaptor from 18mm Female to 1/4in Male BSP thread to allow brass trigger to attach to plastic lance or the Cooper Pegler Brass lance assembly to fit modern CP nozzle caps.