Which countersink spec for Carling A-Series mount screws

[flightlead404]

I'm trying to design a panel using front panel designer utilizing the Blue Sea/Carling A-Series breakers.

The mounting screws are #6-32 countersunk.

Anyone know which countersunk spec?
DIN 74A
ANSI 100 degree
ANSI 82 degree

Thanks

[SailingHarmonie]

Carling doesn't supply mounting hardware, that is an add-on that Blue Sea throws in, with the assumption you will be mounting their breakers in their panels. Since Carling doesn't supply panels, they have no idea how think the panel you will be mounting in, or the style screw you prefer.

If you DO buy the breakers from Blue Sea there is nothing that says you have to use THEIR 6-32 FH machine screws. You can replace them with screws you have full specs for. I am pretty sure that will not break the bank.

[s/v Jedi]

BlueSea adds both countersink and pan head fasteners. I recently did the countersinking on 4 panels and used 82 degree and 90 degree bits. All the imperial sized fasteners were 82 degree incl. the breakers. I only had metric for large rotary switches that were 90 degree.

[GordMay]

In North America, the 82 degree countersink is “standard”, and the 100 degree countersink is usually used on thinner material (& aircraft structures).
The greater the angle, the greater the bearing surface, and the shallower countersink; so, the less likely the screw is to pull through the material.

[s/v Jedi]

Originally Posted by GordMay

In North America, the 82 degree countersink is “standard”, and the 100 degree countersink is usually used on thinner material (& aircraft structures).
The greater the angle, the greater the bearing surface, and the shallower countersink; so, the less likely the screw is to pull through the material.

Yes, but the weaker the head of the fastener