Why don't drives come with the screw

Why don't drives come with the screw m2 slot screw Bubble Wrap Protect #Ready Stock #24 hours Send Out ************************** ➤ Universal Screw Laptop & Desktop • Include Three m2 slot Missing a screw for your SSD is not a troublesome anymore!

m2 slot ASUS Motherboard M2 SSD Screw Anchor Plastic Buckle Compatible with ASUS B360M-K Vouchers ₱ off ₱ off more Product Options

m2 nvme slot I found the right M2 standoffs + screws to use They are supposed to be for ASUS ITX mother board, but are perfect for the Z2 G9 workstation  except it came with a stripped screw head for the NVMe screw holding it down and i want to replace the SSD well i could call Dell and go