Thread size for ADL mag?

[12ozkurl]

I have a couple Rem 700 ADL setups and need a couple screws that hold the mag to the receiver. Anyone know the thread size?

 

[Big Stick]

I often use SteelBed to retain them..................

 

[Al Nyhus]

It is a 4-40 machine screw thread. Any decent hardware store will have it. -Al