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NSN 5305-01-521-2053

High Torque Screw

About this product

1.135 inches fastener length, pan head style, between 0.357 inches and 0.373 inches head diameter, head height: between 0.122 inches and 0.133 inches .

Manufacturer part number NAS7803D13 for national stock number 5305015212053.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-521-2053.

  • MPN or Model

    NAS7803D13

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.323 inches
  • Fastener Length
    1.135 inches
  • Head Style
    Pan
  • Head Diameter
    Between 0.357 inches and 0.373 inches
  • Head Height
    Between 0.122 inches and 0.133 inches
  • Grip Diameter
    Between 0.188 inches and 0.189 inches
  • Shank Unthreaded Hole Diameter
    0.070 inches first hole and 0.075 inches first hole
  • Internal Drive Style
    Cross recess type 1
  • Thread Diameter
    0.190 inches
  • Grip Length
    0.812 inches
  • Thready Qty Per Inch (tpi)
    32
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    0.971 inches first hole
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5731 assn standard single material response or ams 5732 assn standard single material response or ams 5737 assn standard single material response
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Qq-p-416, tyii, cl2 federal specification single treatment response
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas7803 professional/industrial association standard
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Close Tolerance Screw

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Mechanic Bill explains High Torque Screw

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NSN 5305015212053

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS7803D13 National Aerospace Standards
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