GBFans Heatsink Hole Size

Equipment Proton Packs
1

Im trying to find out what diameter the screw holes are for the GBFans Aluminum Heatsink are.

Tries search got nothing. Any help would be appreciated.

Thanks

2

The GBFans heatsinks are threaded for 4-40 size bolts.

3

Thanks man, i of course ended up with the wrong screws, glue will hold it till after my con this weekend i guess!