3.5x35mm x10 EXTENSION STUDS M3.5 Olympic Fixings Extend socket screws. Free P&P

M3.5MM Extension Studs by Olympic Fixings. Bright nickel plated brass M3.5 machine screw extension studs. Solution - M3.5MM EXTENSION STUDS. Simply screw the extension stud into the threaded lug in the wall box & then screw the plate fixing screw into the extension stud.

eBay