5Y1HD PERC Front Tray Bracket screw sizes - R350

Hopefully I got the part number correct for the Front Tray bracket that holds PERC cards.  I've got 6 Dell R350's that I'm adding H355i Front PERC cards to.  I'm missing the screws that hold the PERC card to the tray.  There are 4 of them each.  Can anyone provide the screw sizes that I'm looking for?   Thank you in advance!!!

Edit:  For clarity, here's a picture showing the Perc Front card screws I'm referring to.  I *think* they might be an M3 screw or at least something very close to it.  Screw depth isn't much and I know a M3 x 1/4 is a tad too long.