Torx i ”mellanstorlek”

[IngemarB]

I'm supposed to loosen Lindab gutter brackets in connection with painting. Strangely enough, T15 is too small and T20 is too big. There is no T18 but it feels "just right". The carpenter probably is on vacation so I'd rather not bother him. Could it be a T20 with a hole?

 

[Ymer]

The screw is painted so my guess is that it's a t20 that has gotten too much paint on it in the groove.

 

[Johan Gunverth]

The screw head is eight-pointed. Not even Torx, in other words. You should use square bits for this one.

 

[IngemarB]

The screw is painted so my guess is that it is a t20 that has gotten too much paint on it in the slot.

I thought it was in the steel gray color from the factory, but you might be right. Looks a bit like some screw for sheet metal roofing with a gasket.

 

[Anders243]

Test R1 or R2 (Robertson) bits. They are square as Johan mentions.
Usually used for outdoor sheet metal, I have learned (the hard way).

 

[Henrik 75]

Just like others have responded, you should use fyrkantig.
I just screwed in those and made the same discovery 😊