The following is our longer screws size and matched board thickness: 

 (a)Screw size 25mm(1"):fit for 17.5mm(0.68")-21mm(0.83in)door.

 (b) Screw size 30mm(1.18"): fit for 19mm(0.75")-24mm(0.94") door.

 (c) Screw size 35mm(1.38"): fit for 24mm(0.94")-29mm(1.14") door.

 (d) Screw size 40mm(1.57"): fit for 29mm（1.14")-34mm（1.34"）door.

 (e) Screw size 45mm(1.77"): fit for 34mm(1.34“)-39mm(1.54") door.

 (f) Screw size 50mm(2"): fit for 39mm(1.54“)-44mm(1.74") door.

We have two advice as following :

1. I am thinking is there any way you can buy longer screws from your local depot ? Our screws specification is "M4". You can tell this to your local store seller. They may know it.

2. If you can not find the screws in your home depot. We would like to send the suitable size to you.But we only have the stock of screws in our local warehouse.It will take 7-15 working days to your address.Thanks for your understanding.