1/4" SCREW SIZE .015TH.SHORTENING SHIM .252 Lengthening shims fit over the stripper screw threads and under the shoulder which, in effect, lengthens the stripper screw lengthShortening shims are precision die cut to fit perfectly with close tolerances around the shoulder screw shank to fit under the screw head Inner Diam: 0.252 inOutside Diam: 0.366 inBolt/Screw Size: 1/4 inThickness: 0.0150 inMaterial: Steel 1075Hardness: 44.0 Rc [Min], 47.0 Rc [Max]Thickness Tolerance (-): 0.00075 in [Min]Thickness Tolerance (+): 0.00075 in [Max]Type: Shortening ShimsWt.: 0.02 lb