Just what you need - SIG SAUER Grip Screw Set, P229, 9 mm, Set of 5, Black GSCREWSET-2299

We had a grip screw come loose and fall out somewhere between the range and home on my wife's Sig Sauer P229. We ordered this set to replace it, and it fit perfectly and worked like a charm. One suggestion (which we verified with our local Sig rep before doing), is to put a drop of LocTite Blue (NOT Red) on each screw before tightening. The LocTite will hold the screws in place, but still allow you to remove them if you want to change grips. (LocTite Red is permanent unless you heat the part to ~500 degrees - not what you want to do to your beloved pistol.)

Just to avoid this hassle again, we removed all the grip screws and put a drop of LocTite on each of them before replacing, and none have budged since. I highly recommend these grip screws if you need them, (and LocTite blue to make sure you don't need them again and again).