12X1 STL PHIL/SQ PANCAKE T/S A ZC B250 C1018/1022 HARDENED PHIL/SQ PANCAKE TYPE A TAPPING SCREWS #3 POINT TPI=11 ZINC FULL THREAD ASME B18.6.4 1998 IFI-7 HH 0.078-0.082” HD 0.430-0.450” 250/PACKAGE