OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Honda Engines Yard King 125cc Briggs 450-series which spark plug?

Do you know what plug-hole reach that is classed as?

I mean, almost any of the dozens of used plugs I have match the hole diameter/thread...but none I have match the thread-reach..

so I don't want unoccupied threads on either hole or plug..

I saw some listed on ebay .Chinese brand such as A7 TC which are listed for scooters and wtf else, but look possibly right reach/thread length..

But I'd prefer not to use Chinese plugs but rather work out an NGK part number for a compatible one..