Hi @zachwheele17833
Here's the [https://h10032.www1.hp.com/ctg/Manual/c06074672.pdf|maintenance and service guide] for the laptop, that gives some sizes for the screws you need.
On p.26 it shows the specifications for the 4 screws that hold the base cover but not for the captive screw that is also used.
On p.27 all is says it that there are 5 Philips head screws used to secure the battery, 4 are the same but the other is a broad head screw. Unfortunately, no specifications are shown. You could always use a straightened out paper clip to measure the depth of the screw holes to at least find out what length they need to be
On p.30 it shows the specifications for the single screw used to secure the SSD drive.
If all else fails you could search online for the screw kit for the laptop. Search online for ''L34182-001'' to hopefully find suppliers that have it in stock as most don't. Be aware that the kit contains ''every'' screw that is used in the laptop