This is a case for a GeeekPi 7 inch 1024 x 600 HDMI Screen LCD Display with Driver Board Monitor for Raspberry Pi -
https://www.amazon.com/gp/product/B01L6YXZLY/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=awd-make-20&linkId=9a3a095ed020ad70fcf672b5a096d79d

Assembles with:
4 - M2.5 x 6 Socket head cap screws
4 - M2.5 nuts
2 - M3 x 6 Socket head cap screws
2 - M3 x 16 Socket head cap screws
2 - M3 x 20 Socket head cap screws
6 - M3 nuts

I bought this kit on amazon https://www.amazon.com/gp/product/B01L6YXZLY/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=awd-make-20&linkId=9a3a095ed020ad70fcf672b5a096d79d and it contains the screws you would need.