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14-14 x 1-1/2 Hex Washer Head Self Drilling Screw Zinc Plated Tek #3 (2000) M42-4.50 Socket Cap Screws 12.9 Alloy Plain DIN 912 7/8-9 x 8 Hex Cap14 14 x 1 1 2 Hex Washer Head Self Drilling Screw Zinc Plated Tek #3 (2000). A tapping screw with an integrally formed hex washer head , spaced or unified threads, and a #2 or #3 drill point. Designed to drill through steel. AISI 1022 or equivalent steel. Rockwell C50 56. Meets F. I. P. 1000. 7 for torsional strength & drill speed. Meets ASTM A 510 for carbon steel manufacturing. Zinc plating meets ASTM B 117 for salt spray corrosion. Manufactured to