1-321-802-5889

NSN 5305-00-283-0294

Self-tapping Screw

About this product

1.250 inches fastener length, flat countersunk head style, between 0.320 inches and 0.332 inches head diameter, internal drive style: cross recess type 1.

Manufacturer part number AN531-8R20 for national stock number 5305002830294.

Datasheet

  • Product description

    Tapping Screw NSN 5305-00-283-0294.

  • MPN or Model

    AN531-8R20

  • Schedule B
    7318.14.0000 (Self-tapping screws of iron or steel)
  • NMF (National Motor Freight)
    093486 - Bolts, Nuts Or Screws, NOI (sub 3)
  • Fastener Length
    1.250 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.320 inches and 0.332 inches
  • Internal Drive Style
    Cross recess type 1
  • Nonmachine Thread Style
    Dog type (type b or c)
  • Countersink Angle
    Between 80.0 degrees and 82.0 degrees
  • Nonmachine Thread Diameter
    0.163 inches
  • Material
    Steel
  • Material Specification
    Qq-s-685 cond n federal specification single material response
  • Surface Treatment
    Cadmium or zinc
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Tapping Screw

A hardened externally threaded fastener whose thread extends to the bearing surface of the head. The thread may be fluted or otherwise designed to cut or form its own mating thread. Excludes screw, assembled washer.

Mechanic Bill explains Self-tapping Screw

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NSN 5305002830294

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
AN531-8R20 Aeronautical Standards Group
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