05-01-2022, 04:24 PM
(This post was last modified: 05-01-2022, 04:26 PM by jim currie.)
Don most gun screws are called 6-40 . but that don't mean they all are there are off the top of my head there are 10 different used screws used benign sharp V, unified , Whitworth , modified square , acme , B&S worm , buttress , knuckle , daroelet , metrics , us standard . there might be more but would have to dig out my machinist hand book . but my guess would be 6-40. and after you find a replacement i would use blue lock tight.
Jim
Jim