Saves Your "Tail Feathers" If A Hole Gets Stripped
Slightly larger in diameter than the common 6-48 scope base mounting screw. Most holes "ruined" while drilling or tapping can be fixed; just retap to .146"-48 and install. No need to redrill base or gun. Thanks to Doug Knowt for his tip.
Big Book Catalog, Issue:67, Page:401
SPECS: .146"-48x½" (12.7mm) slotted machine screws,
blued finish. Fillister and Weaver-style head. Kit contains 48 of
each style, 1 taper tap, 1 bottom tap, and 1 Screw Gizzie in a