12-24X1 1/4 Phillips Flat Undercut Thread Cutting Screw Type F Fully Threaded Zinc (Pack Qty 4,000) BC-1220FPU
12-24X1 1/4 Phillips Flat Undercut Thread Cutting Screw Type F Fully Threaded Zinc (Pack Qty 4,000) BC-1220FPU
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Shorpioen

12-24X1 1/4 Phillips Flat Undercut Thread Cutting Screw Type F Fully Threaded Zinc (Pack Qty 4,000) BC-1220FPU

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Key item features

  • Steel thread-cutters are used in heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass and plastic. Stainless screws offer additional resistance to corrosion, 18-8 moreso than 410. When using any thread-cutting screw, the material in which the threads are cut should have a lower hardness by at least 10 to 20 Rockwell hardness points
  • Steel: Screws shall be quenched in liquid and then tempered by reheating to 650°F minimum. 410 Stainless: Screws shall be annealed by heating to 1850-1950°F, held at least for 1/2 hour and rapid air- or oil-quenched then reheating to 525°F minimum for at
  • Steel: AISI 1016 - 1024 or equivalent steel. Stainless: 410 martensitic stainless steel or 18-8 stainless steel
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