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Extra long self drilling screws for steel, available in lengths up to 8"!   These #14 self drillers have 14 threads per inch and a #3 self drill point.  Zinc finish.
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Extra Length Self Drilling Screw 14 x 3" Box of 100 Flat Self Drilling Screw 14 x 3-1/2" Box of 50 Extra Length Self Drilling Screw 14 x 4" Box of 100
Extra Length Self Drilling Screw 14 x 3" Box of 100 Flat Self Drilling Screw 14 x 3-1/2" 50 Pieces. Hex Self Drill Screw #14 x 4" self drilling screw box of 100.
Flat Self Drilling Screw 14 x 4" Box of 50 Flat Self Drilling Screw 1/4 x 4-1/2" 50 Pieces Extra Length Self Drilling Screw 14 x 5"
Flat Self Drilling Screw 1/4 x 4" 50 Pieces Flat Self Drilling Screw 1/4 x 4-1/2" 50 Pieces Hex Self Drill Screw #14 x 5" self drilling screw box of 50.
Extra Length Self Drilling Screw 14 x 6" Extra Length Self Drilling Screw 14 x 8"
Hex Self Drill Screw #14 x 6" self drilling screw box of 50. Hex Self Drill Screw #14 x 8" self drilling screw box of 25.