Could any one help me with these please

[Whitehunter]

[ILH]

Hi,
Interesting markings, don't know what they mean.

They look like vehicle oil drain/check level plugs off the engine/ gearbox/ diff, etc.

i've found similar ones and the copper washers here in west berkshire (if you don't find a 303 in 15 mins- youre machine ain't working!).

[Whitehunter]

Hi,

They look like vehicle oil drain/check level plugs off the engine/ gearbox/ diff, etc.
working!).

You could be on the right track, What machine do you use
I used E-trac, ace 250, x-terra 70

[Pompa Mike]

They certainly have the look of some type of grear box drain plug.

mike

[ILH]

Mine's a Minelab- sovereign elite with 7 1/2in coil for getting in the messy bits.