4-40X1/2 Coarse Thread Socket Head Cap Screw Black DFAR (Pack Qty 100) BC-0408CSP
4-40X1/2 Coarse Thread Socket Head Cap Screw Black DFAR (Pack Qty 100) BC-0408CSP
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4-40X1/2 Coarse Thread Socket Head Cap Screw Black DFAR (Pack Qty 100) BC-0408CSP

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Key item features

  • Ideal for precision assembly work with close tolerances and applications needing a well tooled appearance. Supplies greater tensile strength than equivalent sizes of Grade-5 or Grade-8 hex head cap screws while requiring less surface area or counterbore since the fastener is internally wrenched
  • Cap screws shall be made from an alloy steel which conforms to the following chemical composition requirements (per product analysis)-- Carbon: 0.31% minimum; Phosphorus: 0.040% maximum; Sulfur: 0.045% maximum. Also, one or more of the following elements
  • Cap screws shall be heat treated by oil quenching from above the transformation temperature and then tempered at a temperature not lower than 650°F
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