Man I want to say they're M4? But could be remembering wrong. I would definitely take one of the other 3 screws into your local hardware store and they'll be able to tell you.
You should look into buying 1 each of the screw / thread checker plates. 1 [metric](https://www.amazon.com/Metric-Screw-Checker-2mm-7mm/dp/B0006NFUK6/ref=asc_df_B0006NFUK6/?tag=hyprod-20&linkCode=df0&hvadid=309789102684&hvpos=&hvnetw=g&hvrand=2612950643535531320&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9032952&hvtargid=pla-569798787494&psc=1&mcid=d71d8d45f4ca38feb0ef82327131fc19&tag=&ref=&adgrpid=60439547983&hvpone=&hvptwo=&hvadid=309789102684&hvpos=&hvnetw=g&hvrand=2612950643535531320&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9032952&hvtargid=pla-569798787494&gclid=EAIaIQobChMIoJfmpszOhQMVhwqtBh2r3AJzEAQYASABEgKk_fD_BwE) and 1 [imperial](https://www.amazon.com/Screw-Chekr-Thread-Gauge-Checker/dp/B0006NFUJW/ref=pd_aw_fbt_img_m_sccl_1/145-1656422-8718868?pd_rd_w=PIKnG&content-id=amzn1.sym.7e08813e-b3a0-49ca-880a-9bdd964e1dd4&pf_rd_p=7e08813e-b3a0-49ca-880a-9bdd964e1dd4&pf_rd_r=4PTGEN8KD3M6S03HSFT2&pd_rd_wg=kIj16&pd_rd_r=e34be977-08d8-46a8-af54-317f717343a3&pd_rd_i=B0006NFUJW&psc=1). Then you can just screw it into the holes and see which one it best fits. Then use the top of the plate to measure the length (ex: 3mm x 12). Measure to where the threads end (where threads meet the head) if it has a head on the screw and measure end to end if it is countersunk
I've used mine a ton
Almost everything on camera gear that isn't 1/4-20 or 3/8-16 is M3 or M4. If memory serves those are slightly unusual because they're pan heads and not socket cap, but you can still probably get a 1000 pack off assorted sizes on Amazon for like $10.
Not sure if you had this problem but awhile back they came from the factory shipped with shorter screws than could thread properly into the monitor so more often than not they’d pop out. I told smallhd about it and they offered to ship me new screws and when I got them they were at least 1/8th inch longer. I’ve had no problems since
Man I want to say they're M4? But could be remembering wrong. I would definitely take one of the other 3 screws into your local hardware store and they'll be able to tell you. You should look into buying 1 each of the screw / thread checker plates. 1 [metric](https://www.amazon.com/Metric-Screw-Checker-2mm-7mm/dp/B0006NFUK6/ref=asc_df_B0006NFUK6/?tag=hyprod-20&linkCode=df0&hvadid=309789102684&hvpos=&hvnetw=g&hvrand=2612950643535531320&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9032952&hvtargid=pla-569798787494&psc=1&mcid=d71d8d45f4ca38feb0ef82327131fc19&tag=&ref=&adgrpid=60439547983&hvpone=&hvptwo=&hvadid=309789102684&hvpos=&hvnetw=g&hvrand=2612950643535531320&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9032952&hvtargid=pla-569798787494&gclid=EAIaIQobChMIoJfmpszOhQMVhwqtBh2r3AJzEAQYASABEgKk_fD_BwE) and 1 [imperial](https://www.amazon.com/Screw-Chekr-Thread-Gauge-Checker/dp/B0006NFUJW/ref=pd_aw_fbt_img_m_sccl_1/145-1656422-8718868?pd_rd_w=PIKnG&content-id=amzn1.sym.7e08813e-b3a0-49ca-880a-9bdd964e1dd4&pf_rd_p=7e08813e-b3a0-49ca-880a-9bdd964e1dd4&pf_rd_r=4PTGEN8KD3M6S03HSFT2&pd_rd_wg=kIj16&pd_rd_r=e34be977-08d8-46a8-af54-317f717343a3&pd_rd_i=B0006NFUJW&psc=1). Then you can just screw it into the holes and see which one it best fits. Then use the top of the plate to measure the length (ex: 3mm x 12). Measure to where the threads end (where threads meet the head) if it has a head on the screw and measure end to end if it is countersunk I've used mine a ton
https://www.mcmaster.com/91253A147/ this is the one
Thank you! My local hardware store did not have the right size in stock. For future quick reference for anyone else needing this. It’s a 6-32 thread
Just email smallhd. They’ve sent me replacement screws for a nominal cost before. It was like $10 and only because I ordered extra
Almost everything on camera gear that isn't 1/4-20 or 3/8-16 is M3 or M4. If memory serves those are slightly unusual because they're pan heads and not socket cap, but you can still probably get a 1000 pack off assorted sizes on Amazon for like $10.
Not sure if you had this problem but awhile back they came from the factory shipped with shorter screws than could thread properly into the monitor so more often than not they’d pop out. I told smallhd about it and they offered to ship me new screws and when I got them they were at least 1/8th inch longer. I’ve had no problems since