Yes, those should work just fine. 1911s use a bushing that attaches to the frame into which the screw goes. These are a standard thread available in two lengths, standard thickness grip panels and thin grip panels (to be used with corresponding bushings).
I would suggest considering Challis bushings, grip screws and their o-rings. You should never lose a grip screw with their set-up if properly installed.
A forum community dedicated to SIG Sauer Pistols and SIG Sauer Rifles owners and enthusiasts. Come join the discussion about optics, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more!