NGK BP6ES Spark Plug

[lambs]

TBH, I thought they were all the same although sometimes you see extra numbers on the end like this:

BP6ES-11

The '11' = 1.1mm, which is the factory set spark gap.    NGK spark plug chart showing designation is here:

https://www.sparkplugs.com/Data/uploads/Charts/NGK_Plug_Chart_1.jpg

All the ones I've bought have come with a screw on 'nut', which can be kept or removed depending on the type of plug caps you have.

Not sure what the 7811 vs 5105 means.

[Ardvark]

Looking about for spark plugs for me bike.
NGK BP6ES are the ones I'll be getting.
Are ALL the NGK BP6ES plugs the same or are there different ones with the BP6ES number?
Reason for asking is that some I've seen online have a fixed "screw cap" where others don't.
Could this be the case of the online pic's being "one pic covers all plugs"
Also I've notices different numbers linked to the BP6ES plug ie 7811 and 5105
Any verification will be gratefully received