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NSN 5305-01-438-8284

High Torque Screw

About this product

Between 1.298 inches and 1.328 inches fastener length, flat countersunk head style, 0.633 inches head diameter, grip diameter: between 0.3110 inches and 0.3120 inches .

Manufacturer part number NAS1580A5H13 for national stock number 5305014388284.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-438-8284.

  • MPN or Model

    NAS1580A5H13

  • 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
    Between 0.476 inches and 0.526 inches
  • Fastener Length
    Between 1.298 inches and 1.328 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    0.633 inches
  • Grip Diameter
    Between 0.3110 inches and 0.3120 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.312 inches
  • Grip Length
    Between 0.802 inches and 0.822 inches
  • Thready Qty Per Inch (tpi)
    24
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel comp 4140 or steel comp e4340 or steel comp 8740
  • Thread Series Designator
    Unjf
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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 5305014388284

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1580A5H13 National Aerospace Standards
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